You could at least use VorpX Desktop Viewer (with Immersive Screen display mode in very high resolution with VorpX Beta and ClarityFX+sharpness it can be very beautiful) but hooking an emulator without a profile may be hard. Maybe you can use SuperDepth3D. With VorpX SBS mode if you want. When I tried with another game, it looked worse than VorpX alone (at least on a displayport VR headset and very high resolution like 3840p), and 3D was worse too, but you would have 3D instead of usual VorpX image quality (it may not make such a difference on a VR headset with compression) .
It would be hard to emulate full VR, but you could try a first person mod :
https://www.nexusmods.com/bloodborne/mods/11
And something like that to have headtracking :
https://github.com/opentrack/opentrack/releases
It would be better to be able to increase FOV too with something like that if it’s compatible (and necessary) :
https://www.nexusmods.com/bloodborne/mods/76
It’s just ideas…