I had some thinking about running split camera view on the presenter screen...
I am about to try the following set up.
A proposed solution is to run multiple cameras through another program such as OBS or Logitech Capture, both allow multiple camera inputs then output as a single. Then select the OBS or Logitech Capture as your input into Teams.
I agree Microsoft should present this multi-cam feature for presenters... Whiteboard is only good for digitally written content - no physical tangibility which is what many teachers require such as Art which I what I am presenting, similar to soldering, you can't show how to make a ceramic sculpture, a ceramic planter pot, a card etc on the whiteboard...