Are you checking the API changes on Apple dev blog? Like this one: https://developer.apple.com/news/?id=cjhooqcq
There is more of this stuff there.
You could also give a try to https://apipatrol.tech which monitors these kinds of changes. DISCLAIMER: I am the founder and had the same issues as you. Let me know if that is of some help in any way, please.
Topic:
App Store Distribution & Marketing
SubTopic:
General
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