I had the same problem as you.
What I had to do was to start MSFS2020 and load up a flight. Then I started Virtual Desktop on my Oculus 2 headset. I then went to settings and turned on Snapdragon (it’s part of the regular app now, so just make sure it’s updated), and then choose to launch VR. Once in SteamVR on my headset, I activated VR mode in MSFS2020, which took me into the cockpit without any errors.