I can confirm that, for us, the issue has ben solved by Apple. We could upload an app with the same code that was rejected yesterday.
diegodev
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I have the same problem with a project that was successfully built and published a couple of days ago.
I know my comment does not help but just wanted to pitch it to get visibility that this issue is affecting many projects.
My project is on React Native and the new build that is failing is only a few lines different (and Javascript lines, not even native iOS). No new or upgraded dependences.
If it helps, there is this issue in the React Native project:
https://github.com/facebook/react-native/issues/33789
It seems that the problem is not with a specific framework but with Apple, but that thread became quite active today so any news there might help.