I can't receive push notifications when the app is not opened (FCM-Flutter)

• Create a key in developers.apple and apply it within firebase

• Feed my project with googleservices.plist

• Turn on Push Notifications and Background Modes, and enable Background fetch and Remote notifications under Background Modes.

• Added this code in my info.plist:

Code Block language
<key>FirebaseScreenReportingEnabled</key>
<true/>
<key>FirebaseAppDelegateProxyEnabled</key>
<false/>

Code Block swift
import UIKit
import Flutter
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
    }
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

Code Block swift
import UIKit
import Flutter
import Firebase
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self
      let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
      UNUserNotificationCenter.current().requestAuthorization(
        options: authOptions,
        completionHandler: {_, _ in })
    } else {
      let settings: UIUserNotificationSettings =
      UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
      application.registerUserNotificationSettings(settings)
    }
    application.registerForRemoteNotifications()
    FirebaseApp.configure()
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

Code Block dart
Future sendNotification(String body, String title, bool isAdm) async {
  final String url = 'https://fcm.googleapis.com/fcm/send';
  var notification;
  notification =
  '{"notification": {"body": "${body}", "title": "${title}", "content_available": "true", "click_action": "FLUTTER_NOTIFICATION_CLICK"}, "priority": "high", "to": "MYTOPIC"}';
  final response = await http.post(
      url,
      headers: <String, String>{
        "Content-Type": "application/json",
        "Keep-Alive": "timeout=5",
        "Authorization": "key=MYKEY"
      },
      body: notification
  );
  print(response.body);
}