Just guessing… but when you deploy to the Vive or Rift, you are using Shader Model 5.
Teh Quest specifically runs on Android, that does NOT support Shader Model 5, but ES3.1.
As BernHardRieder stated above the Quest is much less graphically capable currently. You cannot use the same techniques for PC VR with it. The Quest requires a lot of optimization of all things(lighting/models/textures) same as if you were building to a mobile device, which it is…