I'm having the same issue.
Even when I start it from SteamVR, it starts up like a normal 2D game, and even when I set off on a raid it's displayed upside down.
I tried it on Quest Pro and Quest 3 with a virtual desktop.
SPT and Tarkov have been updated, and SPT-VR is no longer compatible?
Doesnt work on 3.10, tested it when 3.10 was still in bleeding edge. Fingers crossed it updates soon.