WebXR Enable the VR Demo

Hi, I have spent the last few days trying to enable a copy of https://github.com/readyplayerme/VR-Demo for use with WebXR - https://github.com/De-Panther/unity-webxr-export.
At first I thought it would be a straight forward excercise but for the life of me I cannot get this to work. Once the project is enabled for WebXR, I lose the ability to move or teleport.
If anyone has been successful at doing this I would love to know how you got this to work.