Here's my new extension, EternalApp !
If a user tries to uninstall the app, it will show a prompt that -
Keep XX.XX KB/MB/GB/TB of app data.
Unfortunately, It just works till Android 10, not higher than it.
And I cannot share screenshots as I don't have any Android 10 device.
A pic from google -
Simply drag and drop the extension in the designer and that's all ! (No blocks)