The test of whether they're in compliance should be whether it's feasible to sell an app to an iOS user without paying anything to Apple.
Apple can charge for whatever they want, but they can't put up a troll bridge between other businesses and their customers. Then you can choose whether to use their service or not. If they want to charge for payment processing, you can use Stripe or Paypal. If they want to charge for XCode, you can use VSCode or emacs. If they want to charge for app distribution, you can use the Epic Games Store -- or Google Play -- or host it yourself on AWS or your own servers. Whatever they want to charge for, they have to open up to competition.
If their services are good and well-priced then people will choose them even when they have an alternative. If they're not, they won't.
Apple can charge for whatever they want, but they can't put up a troll bridge between other businesses and their customers. Then you can choose whether to use their service or not. If they want to charge for payment processing, you can use Stripe or Paypal. If they want to charge for XCode, you can use VSCode or emacs. If they want to charge for app distribution, you can use the Epic Games Store -- or Google Play -- or host it yourself on AWS or your own servers. Whatever they want to charge for, they have to open up to competition.
If their services are good and well-priced then people will choose them even when they have an alternative. If they're not, they won't.