This is my first mac product the macbook air m1, now I have a cousin that has an older model 2018; but one difference is he gets notifications when in clamshell mode. For me when I close my macbook it goes to do not disturb mode and when I check the settings my do not disturb settings is turned off already. So how can I get notification sounds when in clamshell mode. We are both on the same latest firmware; just can't figure how to get this to work.