I got the same problem. Sorry but your link is not helping at all. The XCode Version shown in that troubleshooting-post does not even look like the current version 12.4 anymore. Also it is not really about the archive not showing up. My whole app, which is definitely created inside appstoreconnect, just doesn't appear inside the app list of the organizer window. I already contacted the Apple support and after a few emails back and forth they also can't help me and point the forums. What can I do now? I just want to simply upload my app to Testflight..