Why doesn't sound in the app work on AirPods Pro?

Question

iOS

After updating to iOS 15, there was no sound in the app when playing audio on AirPods Pro model only. With the rest of the models everything is fine. I have a test project but I don't have AirPods Pro. Can anyone test or point out what the problem is?

let url = Bundle.main.url(forResource: "\(masterIndex)0", withExtension: "m4a")!
        
        do {
            
                audioPlayer = try AVAudioPlayer(contentsOf: url)
                audioPlayer.delegate = self
                audioPlayer.prepareToPlay()
                play(sender:AnyObject.self as AnyObject)
            
                setupMediaPlayerNotificationView(true)
                lockScreen()
            
        } catch {
            
}