>>283093905
The actual Doom64 open source port (Doom64EX) doesn't have a VR mod. And considering the original creator is now making an official closed source port, we may never see it.
You could try using the GZDoom port >>283094691 mentioned with the Doom 64 Retribution mod.
https://www.doomworld.com/forum/topic/91854-v15-doom-64-retribution/