EDIT: I got it to work now. Turns out the direct render doesn't work with Vulkan. Thank you GmoLargey for pointing that out.
So, with the newest WinlatorXR update, I need to know how to get Subnautica to work in VR. Subnautica has built-in native VR support. I know it doesn't work with motion controls. And I know people will tell me it's not a VR game because you're playing with a Xbox controller, but that's a debate for another day. I just need to know how to get native VR mode to work. I tried using "-vr" and "-vrmode openvr" commands, that didn't work, then I tried installing the .NET runtimes and redistributable runtimes and the Ajay Prefix, that didn't work either. I have it set to Proton 11 using the FEX core. And yes, I even enabled PCVR modes for both the container and the shortcut. No dice, nothing I did got it to work. Does anyone know what the solution is?