Permissions handler for iOS and Android

[FeodorFitsner]

https://stackoverflow.com/questions/68152221/how-to-request-allow-management-of-all-files-permission-in-flutter-android-11-r

[radiocortello]

I've developed an app for Android (thanks to flet build) that operates smoothly. This app creates a PDF file that is saved in the allocated memory of the application itself. Is there any way to allow users to download this file directly from the app or grant permissions to save it to a shared location on the device? I appreciate your help.