How do you go on DnD but still be reachable?

I know this isn’t a Dev question, but there isn’t actually a user thread here.

If a user is in a shared space, and doesn’t want to distracted by chatter or cameras - the equivalent of putting your headphones on - but still wants to be available if needed. then what approach have you found best?

I’ve tried DnD, but then you’re not contactable even via a Wave or call; that’s a hard DnD.
I’ve also tried Busy, but that doesn’t turn off your/their cam - it’s a metadata tag only.

I’ve asked Gather support, and they say there isn’t a feature. But has anyone found a workaround, for a period of undisturbed work?