The model be imported in the VR template. When i started VR preview i could only walked around the original model.
How to expand the initial VR border?
You need to change the size of the NavMeshBoundsVolume. It’s probably called NavMeshBoundsVolume in the world outliner. You can see it in your picture as the volumebox that is surrounding the floor of the original map. That volume needs to enclose everything you want to move on. I guess you could also add another one if you wanted.