Flutter Notification not showing pop up

Question

Notifications I send with Firebase when the app is open, in the background, and closed work fine.

But I want to pop up, like this:

My codes;

local_notification_service.dart:

class LocalNotificationService {
  static final FlutterLocalNotificationsPlugin _notificationsPlugin =
      FlutterLocalNotificationsPlugin();

  static void initialize(BuildContext context) {
    final InitializationSettings initializationSettings =
        InitializationSettings(
            android: AndroidInitializationSettings("@mipmap/launcher_icon"),
            iOS: IOSInitializationSettings(
              requestSoundPermission: false,
              requestBadgePermission: false,
              requestAlertPermission: false,
            ));

    _notificationsPlugin.initialize(initializationSettings,
        onSelectNotification: (String? route) async {
      if (route != null) {
        Navigator.of(context).pushNamed(route);
      }
    });
  }

  static void display(RemoteMessage message) async {
    try {
      final id = DateTime.now().millisecondsSinceEpoch ~/ 1000;

      final NotificationDetails notificationDetails = NotificationDetails(
          android: AndroidNotificationDetails(
        "kasifkocaeli",
        "kasifkocaeli channel",
        channelDescription: "kasifkocaeli guzel",
        importance: Importance.max,
        priority: Priority.high,
      ));

      await _notificationsPlugin.show(
        id,
        message.notification!.title,
        message.notification!.body,
        notificationDetails,
        payload: message.data["route"],
      );
    } on Exception catch (e) {
      print(e);
    }
  }
}

main.dart:

Future<void> backgroundHandler(RemoteMessage message) async{
  print(message.data.toString());
  print(message.notification!.title);
}

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  FirebaseMessaging.onBackgroundMessage(backgroundHandler);
  runApp(const MyApp());
}

choose_screen.dart:

class _ChoosePageState extends State<ChoosePage> {
  @override
  void initState() {
    super.initState();

    LocalNotificationService.initialize(context);

    //Bildirime tıklandığında gösterilecek mesaj
    FirebaseMessaging.instance.getInitialMessage().then((message) {
      if (message != null) {
        final routeFromMessage = message.data["route"];

        Navigator.of(context).pushNamed(routeFromMessage);
      }
    });

    //forground (uygulama önplandayken)
    FirebaseMessaging.onMessage.listen((message) {
      if (message.notification != null) {
        print(message.notification!.body);
        print(message.notification!.title);
      }

      LocalNotificationService.display(message);
    });

    //Uygulama arkaplandayken ve kullanıcı tıkladığında
    FirebaseMessaging.onMessageOpenedApp.listen((message) {
      final routeFromMessage = message.data["route"];

      Navigator.of(context).pushNamed(routeFromMessage);
    });
  }

pubspec.yaml:

firebase_messaging: ^11.2.13
flutter_local_notifications: ^9.4.0
firebase_core: ^1.13.1
cloud_firestore: ^3.1.10

AndroidManifest:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

<meta-data
android:name="com.google.firebase.messaging.default_notification_channel_id"
android:value="notification_app"/>

And this is my watched video (he did the same with me but the notification screen opens on his app, but not for me. The scene where the notification is shown