But they take a 30% fee for in-app purchases right?

Actually Apple Pay will not work either. We are providing the goods with pay in cash on delivery. But the order flow is in the app, we are just sending the order into our backend system without any payment online. In this case is Apple charging any fee?

Does Apple charge you if you use Apple Pay to sell physical goods? I know for in-app purchases they charge you 30% (if im not wrong), but what about Apple pay? Also do i have to use apple pay if i want to sell physical goods?