Is there any demo or tutorial for VR 3rdPerson view, C++ is better.and how to dynamically switch between VR 1stPerson view and 3rdPerson View?

Development Platform & Builds XR Development
1

is there any demo or tutorial for VR 3rdPerson view, C++ is better
and how to dynamically switch between VR 1stPerson view and 3rdPerson View?
Thanks!