FirebaseMessaging.instance.getAPNSToken always return null

[yonycherkos]

Describe the bug
I have an issue on which i was not able to get APNs token on ios. the push notification works fine on android. I go through FCM apple integration steps repeated with no luck. I am stuck on this issue for weeks.

package versions and testing device

• flutter: 2.2.3
• firebase_core: 1.8.0
• firebase_messaging: 10.0.9
• iPhone 7: 14.4.1 (real device)

xcode configuration

AppDelegate.swift

import UIKit
import Flutter
import Firebase

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

debug console

8.8.0 - [Firebase/Messaging][I-FCM002022] APNS device token not set before retrieving FCM Token for Sender ID '662970956514'. Notifications to this FCM Token will not be delivered over APNS.Be sure to re-retrieve the FCM token once the APNS device token is set.
flutter: APNSToken: null
flutter: Token: c0yzY5QV4EUFudl0fmcCfA:APA91bHzAM9e2jfPEoDBnHQE9xCIG-EwnGatI9RDYPJQ4Apm5tOujBsplHyAqTm2V7DEPXSmDaPcr1okv6qhP-eoWHNmPs3e8IgN9CI4ErS2-W54_EydI2ypZ9ckJNOluLV_ECtWyP4i
[Client] Updating selectors after delegate removal failed with: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service on pid 85 named com.apple.commcenter.coretelephony.xpc was invalidated from this process." UserInfo={NSDebugDescription=The connection to service on pid 85 named com.apple.commcenter.coretelephony.xpc was invalidated from this process.}

Output of flutter doctor -v

[✓] Flutter (Channel stable, 2.2.3, on macOS 11.6 20G165 darwin-x64, locale
  en-ET)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 2020.3)
[✓] VS Code (version 1.61.1)
[✓] Connected device (2 available)

• No issues found!Ï```

</details>

Thank you in advance.