I would also like to add that the comment from me, which mentions a possible resolution works in some devices and in some other, the same issue persists - the widget still shows some placeholder views, and the editing does not work.

The issue is resolved, it was a mistake at my side. I missed to enable "App groups" for the intent extension. The app group id is used by my SQLite db manager, and some SQL queries were being executed when a user add a widget, and also when press edit, which to my surprise caused no issues at all while development, only popped up in release builds

Having the same issue. Xcode Version 12.0 (12A7209). Followed the exact steps suggested here - https://developer.apple.com/documentation/widgetkit/making-a-configurable-widget and SelectCharacterIntentHandling file is never created. Any help will be appreciated.