Cannot open app in Oculus Quest 2

Hi,
I’m trying to build and run the app that I made with Unity.
But when I open the app I cannot run, but I keep seeing this screen.
I guess that black window supposed to be my app, but I have no idea why it is not full screen, also why I cannot run the app.

Do you have any idea? Please help me.

I had the same problem.
In Unity, Edit > Project Settings, somehow my “XR Plug-in Management” had unchecked the Oculus checkbox. Rechecking that box and redoing the build and run it worked. Hope this helps!