How to use AVDelegatingPlaybackCoordinator?

I want to create a SharePlay Application that plays a video without using AVPlayer. From what I have found in the documentation I think I should use the AVDelegatingPlaybackCoordinator. But I can't get it to work. I have created an AVPlaybackCoordinatorPlaybackControlDelegate that looks like this:

class CustomControlDelegate: NSObject, AVPlaybackCoordinatorPlaybackControlDelegate {
    let player: SomePlayer
    
    init(player: SomePlayer) {
        self.player = player
    }
    
    func playbackCoordinator(_ coordinator: AVDelegatingPlaybackCoordinator, didIssue playCommand: AVDelegatingPlaybackCoordinatorPlayCommand, completionHandler: @escaping () -> Void) {
        print("playing")
        player.play()
    }
    
    func playbackCoordinator(_ coordinator: AVDelegatingPlaybackCoordinator, didIssue pauseCommand: AVDelegatingPlaybackCoordinatorPauseCommand, completionHandler: @escaping () -> Void) {
        print("pausing")
        player.pause()
    }
    
    func playbackCoordinator(_ coordinator: AVDelegatingPlaybackCoordinator, didIssue seekCommand: AVDelegatingPlaybackCoordinatorSeekCommand, completionHandler: @escaping () -> Void) {
        print("seek")
    }
    
    func playbackCoordinator(_ coordinator: AVDelegatingPlaybackCoordinator, didIssue bufferingCommand: AVDelegatingPlaybackCoordinatorBufferingCommand, completionHandler: @escaping () -> Void) {
        print("buffer")
    }
}

The player.play() and player.pause() methods work when I call them myself, so this is not the issue.

I Create the coordinator like this:

delegate = SomePlayerControlDelegate(player: somePlayer)
coordinator = AVDelegatingPlaybackCoordinator(playbackControlDelegate: delegate)

When I want to start the player I use this code:

coordinator.coordinateRateChange(to: 1)

And to pause I use:

coordinator.coordinateRateChange(to: 0)

But nothing happens. The playbackCoordinator functions do not get called at all.

Am I using the wrong functions?