TL;DR So ..... a zoom video call costs 30% of revenue. wow. good luck with that.
"App Store rules specifically apply to one-to-a-few or one-to-many events that involve more than two people. Person-to-person experiences between two individuals do not need to use in-app purchases, so tutoring sessions, medical consultations, real estate tours, one-on-one fitness training sessions, and more can be purchased using alternative payment methods…. "
But if there is more than 2 people involved……