Work in progress plugin.
With this plugin you can do requests to remote servers just like you would do normally. Cookies and CORS restrictions don't apply here because the requests is performed by native code.
You just need to change the URL:
const response = await fetch(window.WebviewProxy.convertProxyUrl(url));
console.debug(response);
window.WebviewProxy.clearCookie();
Make sure you are using a custom scheme with your iOS platform
This plugin uses the WKURLSchemeHandler provided by WKWebView. It requires the latest version of cordova-ios.