https://immersive-web.github.io/webxr/#list-of-active-input-sources

An XRSession has the capability of returning the list of inputs see: https://immersive-web.github.io/webxr/#dom-xrsession-getinputsources

This production and maintenance of this frozen array needs to be documented.