[sime]

Which as you prompted me to discover, is Option+clicking on the notifications panel icon in the menu bar to toggle DND for anyone wondering. Of course some apps annoyingly ignore the DND setting (I'm looking at you MS Teams).

[knolan]

You can also swipe in from the right edge of your trackpad and then pull the notification pane down. Much like the hidden search in iOS.

[bookmarkaccount]

I think that is how you access a DND toggle on mac OS as well.