If you take a look at the artifacts created after a successful build, there would be a crash log created with the latest macOS version. Upon opening it, the upload symbols functionality has a crash, which in turn causes the issue of not pushing the dsym. I too was facing this while using XCode cloud with macOS Version 14. Try downgrading macOS version to 13. This worked for me. With macOS version 13 I still get the crash log file but this time its different but crashlytics works as expected.