I am also facing same issue, test iPA giving error saying "App needs to be updated for current iOS 15", if anyone got the fix please reply...

Do we know any solution yet? I am also facing the same issue, i.e  I have a workspace which contains multiple .xcodeproj files, it throws the issue in CI saying- error: Build service could not create build operation: internal error: could not generate PIF because the workspace has not finished loading or is still waiting for package resolution [0m