So KC, if I haven’t worn you out yet, thanks again for your help. I did go thru the thread and, I believe, changed the Open Xr runtime as suggested (I think). The result was progress but not success. Now MSFS no longer says no headset found, and does shift to the two side by side views. And, for the first time ever, I see that “switch to VR” link you mention, but it still doesn’t work. I’ve tried a dozen different times and ways but every time I switch to VR all I get is a totally black screen with the blue Guardian circle.
What to put into the registry isn’t clear. On these forums I’ve seen two recommendations: C:\Program Files\Oculus\Support\oculus-runtime\oculus_openxr_64.json and
C:\Program Files (x86)\Steam\steamapps\common\SteamVR\steamxr_win64.json. Does VD require the use of Steam VR which makes the second entry above the correct one?
Also, I wasn’t able to find information about how to actually edit the registry and may have screwed something up as I tried multiple things.