ATTrackingManager.requestTrackingAuthorization always returns "Not Determined" and prompt is never shown

Hi,

I have read all exisiting posts about this topic, but until now I can not get it to work.

Somehow calling ATTrackingManager.requestTrackingAuthorization  never shows the popup.

I added Privacy - Tracking Usage Description to the info list. I also turned on the system permissions.

I am developing the app with SwiftUI. Target device runs ios 15.4 Any ideas?

Code:

    DeckListView(decks: $store.decks){
             Task {
                  ....
            }
        }
      }.onAppear{
        requestPermission()
      }


   func requestPermission() {
    DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
      if #available(iOS 14, *) {

          ATTrackingManager.requestTrackingAuthorization { status in
          switch status {
          case .authorized:
            // Tracking authorization dialog was shown
            // and we are authorized
            print("Authorized")
             
            // Now that we are authorized we can get the IDFA
            print(ASIdentifierManager.shared().advertisingIdentifier)
          case .denied:
            // Tracking authorization dialog was
            // shown and permission is denied
            print("Denied")
          case .notDetermined:
            // Tracking authorization dialog has not been shown
            print("Not Determined")
          case .restricted:
            print("Restricted")
          @unknown default:
            print("Unknown")
          }
        }
      }
       
    }

  }