■■■■ I was worried that there were going to be issues with the new apple silicon macs and it looks like my worries were justified, have you tried a 4.26 source build? maybe this issue has been fixed recently?
Do you have a regular x86 mac to test as well? Just to isolate the problem to make sure it is something to do with the new apple silicon?
Really sucks that command line UAT is is broken for iOS 