I'm glad to see that there are still people searching for il-2 1946 under VR.
In 2018, I successfully tried to realize the real stereoscopic VR method. Although the effect is very primitive, many bugs, almost impossible to achieve normal air combat, but at least it is a relatively close attempt.
Here is the connection, hoping to help you:
https://gtm.steamproxy.vip/app/15320/discussions/0/1739968490568363590/
In theory 1946 can be compatible with steamVR through mod. There was once a mod that used red and blue glasses to realize stereoscopic display. This shows that from the perspective of graphics engine, the game can realize two eyes rendering separately. However, the moder that achieved this step has already left il2-1946 community. I think in the visible future, a completely smooth 1946 in vr will still be difficult to realize.