Summary of new requirements for IOS app submission

I'm looking for a comprehensive overview of the new requirements that Apple has enacted recently. I understand one new requirement is that the apps be built with XCode 12. Of course that many not even be correct, I just heard that somewhere. Any help finding the official word on this would be greatly appreciated.
Xcode 12 is not yet mandated, more like April 2021 - see:
https://developer.apple.com/news/

...keeping in mind that there subtle differenences between what can be used when building, vs. what is used for submitting/uploading, and, if you are targeting iOS or macOS.

I'm not aware of an 'official'comprehensive summary, but you should see:
https://developer.apple.com/news/releases/
https://developer.apple.com/support/app-store-improvements/
https://developer.apple.com/app-store/review/guidelines/#introduction
https://developer.apple.com/news/?id=03262020b
Summary of new requirements for IOS app submission
 
 
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