AVPlayerViewController in immersive spaces is not possible

I'm trying to get a similar experience to Apple TV's immersive videos, but I cannot figure out how to present the AVPlayerViewController controls detached from the video. I am able to use the same AVPlayer in a window and projected on a VideoMaterial, but I can't figure out how to just present the controls, while displaying the video only in the 3D entity, without having a 2D projection in any view.

Is this even possible?