If you follow the tutorial but do not move Landmark.swift into the new Model group, XCode may not recognize that Landmark.swift is part of the project. Moving Landmark.swift into the Model group will fix the problem if that was the cause.

What happens if you click the “Play” button that you see in your screenshot instead of the line 17 line marker? Also, is there a square (“Stop”) and/or a right pointing triangle (“Play”) in a panel just below the code listing? If so, what happens if you click it?

I had the same experience; Xcode would not recognize the Vision Pro after updating both to beta 2. Changing both the Mac and the Vision Pro to a different WiFi network allowed Xcode to see and pair with the Vision Pro. Then I was able to change both back to the original WiFi network.

This still appears to be a problem. What worked for me was to go to the TestFlight tab, and click on the build number. Then, when I manually added an individual tester, I got the link to Submit for Review of the beta in TestFlight. I had to add the individual tester even though that same tester had already been added as a member of a testing group. So, I guess we just need to "poke" app store connect to get it to look at the build and allow us to submit for beta review.