“Absolutely you can use stripe braintree and others... apple does have very specific rules around you know who you can send off the app store so it's possible.”

Web Payments via Stripe Are Legal — Apple Has Specific Rules on Who Qualifies

Collecting subscription payments on the web to avoid Apple's 30% cut is legal but conditional. Apple allows it only for certain business models under specific conditions — at the time of recording, only a handful of app categories qualified. Stripe and Braintree handle the payment mechanics; qualifying for Apple's external-link entitlement is the real gate.