Eye tracking is good but not accurate enough for macOS. The only thing you can do is to select the macOS window to give it focus (which is useful). Seems like it could also select an app window (where there are several to choose from). I'm planning to install beta so I can use Feedback app directly (I assume this is included with VisionOS beta).
Is that a function of eye tracking or MacOS? My understanding is that a Mac screen on your AVP is essentially just screen sharing, an image. I know i expected eye selection to work with it, but nope. You have to use the Mac’s keyboard and trackpad (or mouse) to control the Mac. I dont often use my AVP with my Mac. I find the AVP native apps to be sufficient for most things.