Yes, it's directly against the terms, but in practice it's not always enforceable. I deployed multiple apps to the App Store using RN and PhoneGap in the past.

Yes, it's directly against the terms, but in practice it's not always enforceable. I deployed multiple apps to the App Store using RN and PhoneGap in the past. Some were rejected for basically using these web based technologies. So my experience is that if you're using web-based tech and left clues in the UX that gives away the fact that you might be loading some external code, the reviewer may catch it and reject.