I know what he means.
He means like can you get out the bus, and like move the actual mirror closer the bus or further away, like a car mirror you adjust. He doesnt want to know if you can move the camera to see the mirror, but actually move the physical mirror.
Unfortunely, I have not come across this feature, which I agree as a fellow would not have gone amis, but equally mirror positions are based on seating positions, and since the seat is constant, the mirrors are constant, and probably requires a bit more coding to make them adjustable.
But never say never!