The X-Box app reuses much the the exact same code as our Playstation and other Smart TV apps that is why it is easier to develop and exists. It also still works on the Xbox One of which there was about 50 million sold any many still in use by our users.
The company has decided not to invest in creating an VR app of any kind for any particular VR product. When that decision was made I closed the other request topic about this to give folks their vote backs. I’m sorry but nothing since then has changed when I have brought this up various times internally.