Same problem here (on Quest 3). I played DCS, stopped for half an hour. I wanted to continue and BAM, crashing on startup. Probably the Oculus update was pushed at that time.
I started investigating, running the cleanup, etc...Looking on internet didn't bring me to this page, as I was looking for DCS crash on start-up, not realising it was the VR part.
After a couple of hours I decided to reinstall everything. Jippie, everything worked again (I thought) as the first times I started DCS after the re-Install it was stil in 2D. Me happy again, until I tried VR again, and crashing...:(
Realising it was the VR part, I ended up finding this tread. Unfortunately I lost a couple of hours....
Some communication about this problem would have been nice.
The above mentioned fix did it for me. I can play again in VR. Still I hope an official fix will come soon.