Project Format shows 16.0, I have also tried dropping it down to 15.3, but got the same error.
Error "GitHub installation was incomplete. Repository was not found. Either the repository does not exist or you do not have permission to access it. Learn More" when I try to setup in Xcode. when clicking thru to grant access to the gitrepo. I am the owner of the gitrepo.
Looking at access on gitHub, I don't see any Apple related account .. what account is needed to be added for xcode cloud.