The middle door is facing the elevator door. Will placing a mirror affect the neighbors in the side door?

Placing a mirror in the middle door facing the elevator door will have no impact on the neighbors next to it. If a doorway is facing the elevator door, it needs to be resolved in Feng Shui. If you feel that hanging a mirror is not particularly good, you should go to a Taoist temple and ask for another feng shui treasure that can resolve elevator doors to be hung on the door. This may be more helpful to you.