Are you also using the 21.1.1 diver ? or and older one ?
Are you also on win10 20h2 ?
The main idea is to look for common part (is this a 21.1.1 driver issue, or more a general non radeon support of the engine ? Is this just a win 10 2h02 issue, or just that peculiar version ?).
This may help the dev to get help fixing the issu (reporting to the engine, to the driver manufacturer or microsoft - good luck with the last two)
Edit:
As written in dev note:
* Not compatible with Oculus Quest currently.
I guess the part "Compatible but not tested with Oculus Rift/S." is just wrong and all oculus doesn't work
I really hope that one day, VR development using common norms so one software won't be just compatible with one hardware.
I mean like webbrowser (webpages compatible both gecko/chromium) or directx (implementes by intel/ nvidia or amd) and not like proprietary stuff (cuda, physx, etc... for example)