lol.
idgaf how anyone has their mirror adjusted, turn your head and look with your eyes before changing lanes, full stop.
If you’re in a vehicle that blocks those direct site lines, then you should have multiple side mirrors with blind spot coverage already.
If you can’t take your eyes off the road long enough to turn your head and check your blind spots, then you are probably not in a spot safe enough to allow a lane change anyway 🤷♂️