I develop flutter project and I use FCM and Local Notification I have issues when iOS phone in background it's not vibrate.
my BackgroundHandler:
@pragma('vm:entry-point')
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
await Firebase.initializeApp();
await setupFlutterNotifications();
showFlutterNotification(message);
}
I use
await Vibration.vibrate(duration: 500);
to vibration.your text