Idk about the meeting thing but do not disturb can do this already. Can set up a multiple schedules to auto turn on/off do not disturb and then allow exceptions from favorite (starred) contacts. You can also allow an exception from someone who calls you 3 times back to back in case they’re calling you from someone else’s phone. And can also allow some apps as exceptions in case you use a 3rd party alarm app or something else that you want to be able to make noise.
Tasker would be mine too. Apparently i don’t have many paid apps lol