My app just got rejected for this issue as well. I'm considering using the URL mentioned above as well.
Actually, since my app uses RevenueCat, they offer a property called managementURL that will take the user to the subscription management screen. So I will probably use that instead. It's not a hard-coded URL like the one above and it supposedly works on Android as well. Unfortunately, I'm not allowed to post that link here but just google "RevenueCat managementURL" and it should be the top result.
Topic:
UI Frameworks
SubTopic:
SwiftUI
Tags: