If you’re using an Oculus headset, you need to manually edit your registry and set your Oculus software to beta branch after you’ve installed OpenXR developer tools. This should make your Oculus headset work and detected correctly.
https://flightsimulator.zendesk.com/hc/en-us/articles/360018555179-How-to-install-OpenXR-
All steps are absolutely necessary to make Oculus VR run optimally.
Yes, the current Oculus implementation is hacky and should emphasize that it currently is a very much working beta.