Hi,
coming from flutter, I also face this issue. Xcode Cloud fails with the following details:
# ERROR: 🛑
Unable to load contents of file list: '/Target Support Files/Pods-Runner/Pods-Runner-frameworks-Release-input-files.xcfilelist'
# ERROR: 🛑
Unable to load contents of file list: '/Target Support Files/Pods-Runner/Pods-Runner-frameworks-Release-output-files.xcfilelist'
# WARNING: ⚠️
Unable to read contents of XCFileList '/Target Support Files/Pods-Runner/Pods-Runner-frameworks-Release-output-files.xcfilelist'
I haven't yet found a solution to this but surprisingly when I rebuild several times it succeeds.
I am following the guide from the flutter CICD page on configuring Xcode Cloud and have a support case with apple on it. as you mentioned the case is still not through to the Xcode Cloud developers...