onNavigationNotification was not being passed through when using the router in MaterialApp and CupertinoApp. I believe this was just an oversight on my part when I wrote https://github.com/flutter/flutter/pull/120385. This PR passes them through.

Fixes https://github.com/flutter/flutter/issues/139903

@maRci0002 Would this totally fix your issue https://github.com/flutter/flutter/issues/139903?