We have a daily asynchronous “meeting” that happens via a topic automatically created each day; this might give you some ideas:
We also create similar topics using Zapier as described in the link above for weekly and semi-monthly meetings, as well, which uses its date calculation features to insert the ISO Week Number into weekly meetings, calculate which day the next meeting is, etc.
For live meetings, using those automated new topics, we request people to add agenda items and any other documents needed for the meeting, so we can go straight to the designated topic for all the materials. And then we post the summaries/notes of the meeting to the same topic after they happen.