As you may or may not know, cockpit view, chase view, and hood view do not have fixed rear-view mirrors on the HUD, whereas bumper is the ONLY view to have it.
I think my question I posted in the description (should the rear-view mirror be only available in bumper cam?) confused some people as the response would be different to the poll question depending on which one you voted.
Sorry about that, I took it out of the description.