diff --git a/backport-changelog/6.8/7129.md b/backport-changelog/6.8/7129.md
new file mode 100644
index 00000000000000..90c9168cdc6f8a
--- /dev/null
+++ b/backport-changelog/6.8/7129.md
@@ -0,0 +1,3 @@
+https://github.com/WordPress/wordpress-develop/pull/7129
+
+* https://github.com/WordPress/gutenberg/pull/62304
diff --git a/lib/compat/wordpress-6.8/class-gutenberg-rest-post-types-controller-6-8.php b/lib/compat/wordpress-6.8/class-gutenberg-rest-post-types-controller-6-8.php
new file mode 100644
index 00000000000000..da0489210e21f1
--- /dev/null
+++ b/lib/compat/wordpress-6.8/class-gutenberg-rest-post-types-controller-6-8.php
@@ -0,0 +1,61 @@
+<?php
+/**
+ * REST API: Gutenberg_REST_Post_Types_Controller_6_8 class
+ *
+ * @package gutenberg
+ */
+
+/**
+ * Gutenberg_REST_Post_Types_Controller_6_8 class
+ *
+ * Add Block Editor default rendering mode to the post type response
+ * to allow enabling/disabling at the post type level.
+ */
+class Gutenberg_REST_Post_Types_Controller_6_8 extends WP_REST_Post_Types_Controller {
+	/**
+	 * Add Block Editor default rendering mode setting to the response.
+	 *
+	 * @param  WP_Post_Type    $item    Post type object.
+	 * @param  WP_REST_Request $request Request object.
+	 * @return WP_REST_Response Response object.
+	 */
+	public function prepare_item_for_response( $item, $request ) {
+		$response = parent::prepare_item_for_response( $item, $request );
+		$context  = ! empty( $request['context'] ) ? $request['context'] : 'view';
+
+		// Property will only exist if the post type supports the block editor.
+		if ( 'edit' === $context && property_exists( $item, 'default_rendering_mode' ) ) {
+			/**
+			 * Filters the block editor rendering mode for a post type.
+			 *
+			 * @since 6.8.0
+			 * @param string       $default_rendering_mode Default rendering mode for the post type.
+			 * @param WP_Post_Type $post_type              Post type name.
+			 * @return string Default rendering mode for the post type.
+			 */
+			$rendering_mode = apply_filters( 'post_type_default_rendering_mode', $item->default_rendering_mode, $item );
+
+			/**
+			 * Filters the block editor rendering mode for a specific post type.
+			 * Applied after the generic `post_type_default_rendering_mode` filter.
+			 *
+			 * The dynamic portion of the hook name, `$item->name`, refers to the post type slug.
+			 *
+			 * @since 6.8.0
+			 * @param string       $default_rendering_mode Default rendering mode for the post type.
+			 * @param WP_Post_Type $post_type              Post type object.
+			 * @return string Default rendering mode for the post type.
+			 */
+			$rendering_mode = apply_filters( "post_type_{$item->name}_default_rendering_mode", $rendering_mode, $item );
+
+			// Validate the filtered rendering mode.
+			if ( ! in_array( $rendering_mode, gutenberg_post_type_rendering_modes(), true ) ) {
+				$rendering_mode = 'post-only';
+			}
+
+			$response->data['default_rendering_mode'] = $rendering_mode;
+		}
+
+		return rest_ensure_response( $response );
+	}
+}
diff --git a/lib/compat/wordpress-6.8/post.php b/lib/compat/wordpress-6.8/post.php
new file mode 100644
index 00000000000000..26e6c3adc07a3d
--- /dev/null
+++ b/lib/compat/wordpress-6.8/post.php
@@ -0,0 +1,57 @@
+<?php
+/**
+ * Temporary compatibility shims for block APIs present in Gutenberg.
+ *
+ * @package gutenberg
+ */
+
+/**
+ * Get the available rendering modes for the Block Editor.
+ *
+ * post-only: This mode extracts the post blocks from the template and renders only those.
+ * The idea is to allow the user to edit the post/page in isolation without the wrapping template.
+ *
+ * template-locked: This mode renders both the template and the post blocks
+ * but the template blocks are locked and can't be edited. The post blocks are editable.
+ *
+ * @return array Array of available rendering modes.
+ */
+function gutenberg_post_type_rendering_modes() {
+	return array(
+		'post-only',
+		'template-locked',
+	);
+}
+
+/**
+ * Add the default_rendering_mode property to the WP_Post_Type object.
+ * This property can be overwritten by using the post_type_default_rendering_mode filter.
+ *
+ * @param array  $args      Array of post type arguments.
+ * @param string $post_type Post type key.
+ * @return array Updated array of post type arguments.
+ */
+function gutenberg_post_type_default_rendering_mode( $args, $post_type ) {
+	$rendering_mode  = 'page' === $post_type ? 'template-locked' : 'post-only';
+	$rendering_modes = gutenberg_post_type_rendering_modes();
+
+	// Make sure the post type supports the block editor.
+	if (
+		wp_is_block_theme() &&
+		( isset( $args['show_in_rest'] ) && $args['show_in_rest'] ) &&
+		( isset( $args['supports'] ) && in_array( 'editor', $args['supports'], true ) )
+	) {
+		// Validate the supplied rendering mode.
+		if (
+			isset( $args['default_rendering_mode'] ) &&
+			in_array( $args['default_rendering_mode'], $rendering_modes, true )
+		) {
+			$rendering_mode = $args['default_rendering_mode'];
+		}
+
+		$args['default_rendering_mode'] = $rendering_mode;
+	}
+
+	return $args;
+}
+add_filter( 'register_post_type_args', 'gutenberg_post_type_default_rendering_mode', 10, 2 );
diff --git a/lib/compat/wordpress-6.8/rest-api.php b/lib/compat/wordpress-6.8/rest-api.php
new file mode 100644
index 00000000000000..da1b657cda0783
--- /dev/null
+++ b/lib/compat/wordpress-6.8/rest-api.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ * PHP and WordPress configuration compatibility functions for the Gutenberg
+ * editor plugin changes related to REST API.
+ *
+ * @package gutenberg
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	die( 'Silence is golden.' );
+}
+
+if ( ! function_exists( 'gutenberg_add_post_type_rendering_mode' ) ) {
+	/**
+	 * Add Block Editor default rendering mode to the post type response.
+	 */
+	function gutenberg_add_post_type_rendering_mode() {
+		$controller = new Gutenberg_REST_Post_Types_Controller_6_8();
+		$controller->register_routes();
+	}
+}
+add_action( 'rest_api_init', 'gutenberg_add_post_type_rendering_mode' );
diff --git a/lib/load.php b/lib/load.php
index d7e4a33cd02c92..100160176f3911 100644
--- a/lib/load.php
+++ b/lib/load.php
@@ -49,6 +49,8 @@ function gutenberg_is_experiment_enabled( $name ) {
 	// WordPress 6.8 compat.
 	require __DIR__ . '/compat/wordpress-6.8/block-comments.php';
 	require __DIR__ . '/compat/wordpress-6.8/class-gutenberg-rest-comment-controller-6-8.php';
+	require __DIR__ . '/compat/wordpress-6.8/class-gutenberg-rest-post-types-controller-6-8.php';
+	require __DIR__ . '/compat/wordpress-6.8/rest-api.php';
 
 	// Plugin specific code.
 	require_once __DIR__ . '/class-wp-rest-global-styles-controller-gutenberg.php';
@@ -120,6 +122,7 @@ function gutenberg_is_experiment_enabled( $name ) {
 require __DIR__ . '/compat/wordpress-6.8/preload.php';
 require __DIR__ . '/compat/wordpress-6.8/blocks.php';
 require __DIR__ . '/compat/wordpress-6.8/functions.php';
+require __DIR__ . '/compat/wordpress-6.8/post.php';
 
 // Experimental features.
 require __DIR__ . '/experimental/block-editor-settings-mobile.php';
diff --git a/packages/edit-site/src/components/block-editor/use-site-editor-settings.js b/packages/edit-site/src/components/block-editor/use-site-editor-settings.js
index 5c75de6d81e720..186f4aacf79232 100644
--- a/packages/edit-site/src/components/block-editor/use-site-editor-settings.js
+++ b/packages/edit-site/src/components/block-editor/use-site-editor-settings.js
@@ -36,9 +36,7 @@ function useNavigateToPreviousEntityRecord() {
 	return goBack;
 }
 
-export function useSpecificEditorSettings(
-	shouldUseTemplateAsDefaultRenderingMode
-) {
+export function useSpecificEditorSettings() {
 	const { params } = useLocation();
 	const { canvas = 'view' } = params;
 	const onNavigateToEntityRecord = useNavigateToEntityRecord();
@@ -49,11 +47,6 @@ export function useSpecificEditorSettings(
 		};
 	}, [] );
 
-	// TODO: The `shouldUseTemplateAsDefaultRenderingMode` check should be removed when the default rendering mode per post type is merged.
-	// @see https://github.com/WordPress/gutenberg/pull/62304/
-	const defaultRenderingMode = shouldUseTemplateAsDefaultRenderingMode
-		? 'template-locked'
-		: 'post-only';
 	const onNavigateToPreviousEntityRecord =
 		useNavigateToPreviousEntityRecord();
 	const defaultEditorSettings = useMemo( () => {
@@ -63,7 +56,6 @@ export function useSpecificEditorSettings(
 			richEditingEnabled: true,
 			supportsTemplateMode: true,
 			focusMode: canvas !== 'view',
-			defaultRenderingMode,
 			onNavigateToEntityRecord,
 			onNavigateToPreviousEntityRecord,
 			isPreviewMode: canvas === 'view',
@@ -71,7 +63,6 @@ export function useSpecificEditorSettings(
 	}, [
 		settings,
 		canvas,
-		defaultRenderingMode,
 		onNavigateToEntityRecord,
 		onNavigateToPreviousEntityRecord,
 	] );
diff --git a/packages/edit-site/src/components/editor/index.js b/packages/edit-site/src/components/editor/index.js
index 51d734f25c6adb..1d115dca7518df 100644
--- a/packages/edit-site/src/components/editor/index.js
+++ b/packages/edit-site/src/components/editor/index.js
@@ -131,9 +131,7 @@ export default function EditSiteEditor( { isPostsList = false } ) {
 		'edit-site-editor__loading-progress'
 	);
 
-	const settings = useSpecificEditorSettings(
-		!! context?.postId && context?.postType !== 'post'
-	);
+	const settings = useSpecificEditorSettings();
 	const styles = useMemo(
 		() => [
 			...settings.styles,
diff --git a/packages/editor/src/components/provider/index.js b/packages/editor/src/components/provider/index.js
index 50d02610062c00..6c05e5b58235b3 100644
--- a/packages/editor/src/components/provider/index.js
+++ b/packages/editor/src/components/provider/index.js
@@ -72,8 +72,7 @@ const NON_CONTEXTUAL_POST_TYPES = [
  * @return {Array} Block editor props.
  */
 function useBlockEditorProps( post, template, mode ) {
-	const rootLevelPost =
-		mode === 'post-only' || ! template ? 'post' : 'template';
+	const rootLevelPost = mode === 'template-locked' ? 'template' : 'post';
 	const [ postBlocks, onInput, onChange ] = useEntityBlockEditor(
 		'postType',
 		post.type,
@@ -164,30 +163,48 @@ export const ExperimentalEditorProvider = withRegistryProvider(
 		BlockEditorProviderComponent = ExperimentalBlockEditorProvider,
 		__unstableTemplate: template,
 	} ) => {
-		const { editorSettings, selection, isReady, mode, postTypeEntities } =
-			useSelect(
-				( select ) => {
-					const {
-						getEditorSettings,
-						getEditorSelection,
-						getRenderingMode,
-						__unstableIsEditorReady,
-					} = select( editorStore );
-					const { getEntitiesConfig } = select( coreStore );
+		const {
+			editorSettings,
+			selection,
+			isReady,
+			mode,
+			defaultMode,
+			postTypeEntities,
+			hasLoadedPostObject,
+		} = useSelect(
+			( select ) => {
+				const {
+					getEditorSettings,
+					getEditorSelection,
+					getRenderingMode,
+					__unstableIsEditorReady,
+				} = select( editorStore );
+				const { getEntitiesConfig } = select( coreStore );
+
+				const postTypeObject = select( coreStore ).getPostType(
+					post.type
+				);
+
+				const _hasLoadedPostObject = select(
+					coreStore
+				).hasFinishedResolution( 'getPostType', [ post.type ] );
 
-					return {
-						editorSettings: getEditorSettings(),
-						isReady: __unstableIsEditorReady(),
-						mode: getRenderingMode(),
-						selection: getEditorSelection(),
-						postTypeEntities:
-							post.type === 'wp_template'
-								? getEntitiesConfig( 'postType' )
-								: null,
-					};
-				},
-				[ post.type ]
-			);
+				return {
+					hasLoadedPostObject: _hasLoadedPostObject,
+					editorSettings: getEditorSettings(),
+					isReady: __unstableIsEditorReady(),
+					mode: getRenderingMode(),
+					defaultMode:
+						postTypeObject?.default_rendering_mode ?? 'post-only',
+					selection: getEditorSelection(),
+					postTypeEntities:
+						post.type === 'wp_template'
+							? getEntitiesConfig( 'postType' )
+							: null,
+				};
+			},
+			[ post.type ]
+		);
 		const shouldRenderTemplate = !! template && mode !== 'post-only';
 		const rootLevelPost = shouldRenderTemplate ? template : post;
 		const defaultBlockContext = useMemo( () => {
@@ -282,7 +299,15 @@ export const ExperimentalEditorProvider = withRegistryProvider(
 					}
 				);
 			}
-		}, [] );
+		}, [
+			createWarningNotice,
+			initialEdits,
+			settings,
+			post,
+			recovery,
+			setupEditor,
+			updatePostLock,
+		] );
 
 		// Synchronizes the active post with the state
 		useEffect( () => {
@@ -301,15 +326,15 @@ export const ExperimentalEditorProvider = withRegistryProvider(
 
 		// Sets the right rendering mode when loading the editor.
 		useEffect( () => {
-			setRenderingMode( settings.defaultRenderingMode ?? 'post-only' );
-		}, [ settings.defaultRenderingMode, setRenderingMode ] );
+			setRenderingMode( defaultMode );
+		}, [ defaultMode, setRenderingMode ] );
 
 		useHideBlocksFromInserter( post.type, mode );
 
 		// Register the editor commands.
 		useCommands();
 
-		if ( ! isReady ) {
+		if ( ! isReady || ! mode || ! hasLoadedPostObject ) {
 			return null;
 		}
 
diff --git a/packages/editor/src/store/reducer.native.js b/packages/editor/src/store/reducer.native.js
index 7566dfc5dfd038..fbf6c968f57d08 100644
--- a/packages/editor/src/store/reducer.native.js
+++ b/packages/editor/src/store/reducer.native.js
@@ -9,6 +9,7 @@ import { combineReducers } from '@wordpress/data';
 import {
 	postId,
 	postType,
+	renderingMode,
 	saving,
 	postLock,
 	postSavingLock,
@@ -82,6 +83,7 @@ export default combineReducers( {
 	postId,
 	postType,
 	postTitle,
+	renderingMode,
 	saving,
 	postLock,
 	postSavingLock,
diff --git a/test/native/integration-test-helpers/initialize-editor.js b/test/native/integration-test-helpers/initialize-editor.js
index 511f0223e11356..3b89da979aee3a 100644
--- a/test/native/integration-test-helpers/initialize-editor.js
+++ b/test/native/integration-test-helpers/initialize-editor.js
@@ -10,6 +10,8 @@ import { v4 as uuid } from 'uuid';
 import { createElement, cloneElement } from '@wordpress/element';
 // eslint-disable-next-line no-restricted-imports
 import { initializeEditor as internalInitializeEditor } from '@wordpress/edit-post';
+import { store as coreStore } from '@wordpress/core-data';
+import { select } from '@wordpress/data';
 
 /**
  * Internal dependencies
@@ -28,6 +30,21 @@ import { getGlobalStyles } from './get-global-styles';
  * @return {import('@testing-library/react-native').RenderAPI} A Testing Library screen.
  */
 export async function initializeEditor( props, { component } = {} ) {
+	const resolutionSpy = jest.spyOn(
+		select( coreStore ),
+		'hasFinishedResolution'
+	);
+	const actualResolution = resolutionSpy.getMockImplementation();
+	resolutionSpy.mockImplementation( ( selectorName, args ) => {
+		// The mobile editor only supports the `post-only` rendering mode, so we
+		// presume a resolved `getPostType` selector to unblock editor rendering.
+		if ( 'getPostType' === selectorName ) {
+			return true;
+		}
+
+		return actualResolution( selectorName, args );
+	} );
+
 	const uniqueId = uuid();
 	const postId = `post-id-${ uniqueId }`;
 	const postType = 'post';
diff --git a/test/performance/fixtures/perf-utils.ts b/test/performance/fixtures/perf-utils.ts
index 592e8194852e3b..8d23d91ff91bfd 100644
--- a/test/performance/fixtures/perf-utils.ts
+++ b/test/performance/fixtures/perf-utils.ts
@@ -97,6 +97,26 @@ export class PerfUtils {
 		return canvas;
 	}
 
+	/**
+	 * Change the rendering mode of the editor.
+	 *
+	 * Setting the rendering mode to something other than the default is sometimes
+	 * needed when for example we want to update the contents of the editor from a
+	 * HTML file. Calling the resetBlocks method of the core/block-editor store will
+	 * replace the contents of the template if the rendering mode is not post-only.
+	 * So this should always be called before the resetBlocks method is used.
+	 *
+	 * @param newRenderingMode Rendering mode to set
+	 *
+	 * @return Promise<void>
+	 */
+	async setRenderingMode( newRenderingMode: string ) {
+		await this.page.evaluate( ( _newRenderingMode ) => {
+			const { dispatch } = window.wp.data;
+			dispatch( 'core/editor' ).setRenderingMode( _newRenderingMode );
+		}, newRenderingMode );
+	}
+
 	/**
 	 * Loads blocks from the small post with containers fixture into the editor
 	 * canvas.
diff --git a/test/performance/specs/site-editor.spec.js b/test/performance/specs/site-editor.spec.js
index 9c9d8aec71da4a..e72d83fa8b3aa4 100644
--- a/test/performance/specs/site-editor.spec.js
+++ b/test/performance/specs/site-editor.spec.js
@@ -64,6 +64,7 @@ test.describe( 'Site Editor Performance', () => {
 
 		test( 'Setup the test page', async ( { admin, perfUtils } ) => {
 			await admin.createNewPost( { postType: 'page' } );
+			await perfUtils.setRenderingMode( 'post-only' );
 			await perfUtils.loadBlocksForLargePost();
 
 			draftId = await perfUtils.saveDraft();
@@ -122,6 +123,7 @@ test.describe( 'Site Editor Performance', () => {
 
 		test( 'Setup the test post', async ( { admin, editor, perfUtils } ) => {
 			await admin.createNewPost( { postType: 'page' } );
+			await perfUtils.setRenderingMode( 'post-only' );
 			await perfUtils.loadBlocksForLargePost();
 			await editor.insertBlock( { name: 'core/paragraph' } );