You can hide the app (no badge, no dot visible) and snooze notifications, but leave them on system-wide, and then if someone mentions you with something importa

You can hide the app (no badge, no dot visible) and snooze notifications, but leave them on system-wide, and then if someone mentions you with something important, they can click the "yes this is important" confirmation link. (And if someone abuses that then you can mute them personally)