Using the firebase flutter firebase_messaging: ^6.0.9 with google official documentation almost no solution to get rich ios image notification.
what I have tried:
I found that in react native developers used this
using the Extensions Framework you can use the CarnivalNotificationServiceExtension class to handle the default implementation for you
looking for the similar solution in google firebase_messaging
references for the issue:
https://github.com/FirebaseExtended/flutterfire/issues/357 (long time still unresolved)
https://github.com/MaikuB/flutter_local_notifications/issues/111