Double tap is reachability for me and triple tap is to make the display very dim so that at night at the lowest brightness setting, I can get it even lower. It

Double tap is reachability for me and triple tap is to make the display very dim so that at night at the lowest brightness setting, I can get it even lower. It resets after a while so even if I forget to switch it off my screen won’t stay dim for the next few days while I wonder why it’s so damn dark.