First option doesn't work. I needed to upload new builds to another individual developers Appstore Connect account. I've been added as an App Manager in that account and then tried to export an ipa file, but Xcode didn't let me do it because the bundle identifier is not registered to my account. Now apparently no one except an account holder can submit new builds. But they still didn’t remove “upload builds” from list of privileges of app manager or developer role. Is that correct?