TestFlight on Mac shows that the App only supports iOS, but support for Mac has been enabled in Xcode configuration and on the web page. Even if I build directly with a version from a few months ago, I still have the same problem. The minimum macOS version of the build metadata on the web page is blank. My environment is Xcode 16.1 macOS 15.1
TestFlight on Mac shows that the App only supports iOS
I didn't do anything afterwards, and the build was normal the next day. It should be a problem with Apple's backend processing.