I also use the Oculus Rift CV1. When using the latest Nvidia driver 452.06 (as recommended for MSFS) in Vulcan mode, I get a black screen in the Oculus, but a proper picture on the regular monitor. This problem exists with any driver which is newer then 442.59, which is that last proper working one.
Only switching back to openGL solves this. However this reduces the frame rate.
This happens with the regular AFS2 version as well with alpha and beta.
As reinstalling the Nvidea driver always takes quite a long time, I finally have to decide:
Do I wish a smoother running MSFS or a smooth working VR in AFS2.
A tough decision...
It's been like this for months. I don't understand why it's not fixed yet