Quest-style controllers are something that Apple would have to faciliate. They are tracked using a combination of motion sensors (high resolution but prone to drift) and detection by the headsets cameras (low resolution but doesn't drift) and the Vision Pros raw camera data is only visible to the operating system.

You can connect a traditional controller of course, they showed it working with a Playstation controller in one of the clips, but that's mainly useful for playing traditional flat-screen games on a virtual big screen and not so much for games which actually explore the possibilities of VR and AR.