Hey all, I got a bug submission in for this, so I took a look at it in 4.24 preview 1. ( Scalable quality, Mobile/Tablet , XR Enabled)
I had to disable Instanced Stereo in DefaultEngine.ini (known issue (fixed in preview 2) that will cause project to crash when opening)
But after disabling that and adding ‘Quest’ to that array, I was able to launch onto the Quest with none of those artifacts.