Backup and restore packgae registry

Hi all,
I using self-managed GitLab to manage many java application. I also use gitlab package registry to store the artifacts (jar file) and use AWS S3 as the storage path. My company want to setup a plan for the gitlab backup. I review gitlab document: Back up and restore GitLab | GitLab. I don’t see any mention relate to how we can backup the packages in package registry

I don’t know when I restore gitlab with new instance, the new package registry will recognize my packages in S3?

Anyone has exp about this, please advise me. Thanks a lot!!!