I am using Xcode 26.4.1 (17E202). To copy the dylib, I am using a custom made Xcode build phase. I opened the resulting IPA to check, and the .dylib is present in Payload/AlbusAir.app/Frameworks/libswiftCompatibilitySpan.dylib. I put it here because the ITMS-90429 error told me that the file is expected in /Payload/AlbusAir.app/Frameworks. I checked the thread that you linked but I don't see any useful answer made to the OP, did I miss something? Thanks for your help !

Here is the feedback number: FB16094609 Thank you for your help!

No, if I try to go inside the Cloud tab with other projects I have the Xcode Cloud welcome page with the Get Started button.

Here is the output, with names related to the company, brand and products anonymised archivable_products.json