I've been getting intermittent failures on Xcode code compiling my app on multiple platforms because it fails to compile a metal shader. The Metal Toolchain was not installed and could not compile the Metal source files. Download the Metal Toolchain from Xcode > Settings > Components and try again. Sometimes if I re-run it, it works fine. Then I'll run it again, and it will fail. If you tell me to file a feedback, please tell me what information would be useful and actionable, because this is all I have.

Xcode Cloud builds are hanging forever at the final step, Prepare Build for App Store Connect. This is a common issue that requires some fix in Cupertino. Reporting this in the afternoon of Jan 13, Pacific Time.