Quest 2 black screen with 3 dots, but only for my own app.

Follow up:  Same result on both my quest and quest 2, so the problem is likely in app.  What are your favorite tools for debugging on device?  I have OVRmetrics available, as well as the standard ODH performance tab.

Again, app performs as expected in editor, build is successful, and loads correctly for a split second.  Then the black screen of three balls…. I did notice some usb debugging permissions requests acting funny (I have to accept like 5 times before it “sticks”, could be related?)

Any other suggestions?  So very grateful in advance.

I remember this happening to me in the past. I think it was because the "Stereo Rendering Mode" was set incorrectly in the XR Plugin Management settings for Android.

Try running the "OVR Performance Lint" tool (Under the Oculus menu if you've got the Oculus Integration installed). I think that will point out issues like this.

This occurred when the app's performance was extremely poor. Try removing most details in the map, including the character or skeletal mesh (spawn a spectator instead, if need-be). It should be running better. Then, you can narrow the root problem and then optimize that asset.

Try Unchecking the ArCore in XR-plug-in Management and checking the Oculus
in Player -> otherSetting ->Graphics API, add Vulkun 
In BuildSettings set Texture Compression to ETCT2
this works for me!