Just override activate()

integrations/enterprise-search.php

@@ -24,11 +24,19 @@ class EnterpriseSearchIntegration extends Integration {
 	 * this function to prevent loading of integration again from platform side.
 	 */
 	public function is_loaded(): bool {
-		return false; // Set to false for now.
+		return class_exists( \Automattic\VIP\Search\Search::class );
 	}
 
-	public function is_active(): bool {
-		return false; // Set to false for now.
+	/**
+	 * Activates this integration with given options array.
+	 *
+	 * @param array $options An associative options array for the integration.
+	 *                       This can contain common parameters and integration specific parameters in `config` key.
+	 *
+	 * @private
+	 */
+	public function activate( array $options = [] ): void {
+		// Do nothing for now.
 	}