Thanks for replying. Yeah I ran your exact commands and got the same result.
So I decided to try exactly what you did and create a dummy TestApp MacOS app using XCode. This one I could submit using notarytool so there is something specifically different about the zip that I have created for my actual app. Could it be the size of the zip? My app zip is 4.38GB. The app itself is created using Unity (il2cpp compilation)
mortyluke
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I have posted this as a bug to the Feedback Assistant. Bug number is FB11752328