FCM OnTokenRefresh() method is not called

I'm trying to get a device token from FCM.
This code is working in the demo project, but when I try to use it in my project, the OnTokenRefresh method is not called. I did all setup perfectily but i don't know why method is not called.

Thank you.

FirebaseInstanceIDService.cs

[Service]
[IntentFilter(new[] { "com.google.firebase.INSTANCE_ID_EVENT" })]
[System.Obsolete]
public class FirebaseInstanceIDService : FirebaseInstanceIdService
{
	const string TAG = "MyFirebaseIIDService";

	// [START refresh_token]
	[System.Obsolete]
	public override void OnTokenRefresh()
	{
		// Get updated InstanceID token.
		var refreshedToken = FirebaseInstanceId.Instance.Token;
		Android.Util.Log.Debug(TAG, "Refreshed token: " + refreshedToken);
		System.Diagnostics.Debug.WriteLine($"######Token######  :  {refreshedToken}");
	   
		Xamarin.Forms.Application.Current.Properties["Fcmtocken"] = FirebaseInstanceId.Instance.Token ?? "";
		Xamarin.Forms.Application.Current.SavePropertiesAsync();
	}
	// [END refresh_token]
}

MainActivity.cs

protected override void OnCreate(Bundle savedInstanceState)
{
	TabLayoutResource = Resource.Layout.Tabbar;
	ToolbarResource = Resource.Layout.Toolbar;
   
	base.Window.RequestFeature(WindowFeatures.ActionBar);
	CrossCurrentActivity.Current.Init(this, savedInstanceState);
	base.OnCreate(savedInstanceState);

	
	Xamarin.Essentials.Platform.Init(this, savedInstanceState);

	global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
	NotificationCenter.CreateNotificationChannel(new NotificationChannelRequest());
	Xamarin.FormsMaps.Init(this, savedInstanceState);
	ZXing.Net.Mobile.Forms.Android.Platform.Init();
	
	FirebaseApp.InitializeApp(this);
	
	LoadApplication(new App());
    NotificationCenter.NotifyNotificationTapped(Intent);           
}

What you are doing there is obsolete.

For startup scenarios you should implement a Android.Gms.Tasks.IOnSuccessListener somewhere and register that listener like so:

<!-- language-all: csharp -->

FirebaseApp.InitializeApp(context);
FirebaseMessaging.Instance.GetToken().AddOnSuccessListener(<your listener instance here>);

Then change FirebaseInstanceIdService to FirebaseMessagingService instead:

[Service(Exported = false)]
[IntentFilter(new[] { "com.google.firebase.MESSAGING_EVENT" })]
public sealed class MyMessagingService : FirebaseMessagingService
{
    public override void OnMessageReceived(RemoteMessage message)
    {
        // you got a notification
    }

    public override void OnNewToken(string token)
    {
        // you got a new token
    }
}