It has been 2 days and I still see this warning.

Here is how I got it and the https of the repo:

suse15r5:~ # zypper ref
Repository 'Packman 15.5 Repository' is up to date.                             
Repository 'Update repository of openSUSE Backports' is up to date.             
Repository 'openSUSE-Leap-15.5-Non-Oss' is up to date.                          
Repository 'openSUSE-Leap-15.5-Oss' is up to date.                              
Repository 'Update repository from SUSE Linux Enterprise 15' is up to date.     
Repository 'openSUSE-Leap-15.5-Update' is up to date.                           
Repository 'Update Repository (Non-Oss)' is up to date.                         
Repository 'TeamViewer - x86_64' is up to date.                                 
All repositories have been refreshed.
Loading repository data...
Warning: Repository 'Update Repository (Non-Oss)' metadata expired since 2023-09-24 07:08:29 CDT.

    Warning: Repository metadata expired: Check if 'autorefresh' is turned on
    (zypper lr), otherwise manualy refresh the repository (zypper ref). If this
    does not solve the issue, it could be that you are using a broken mirror or
    the server has actually discontinued to support the repository.

Reading installed packages...
Nothing to do.

/etc/zypp/repos.d/os-repo-update.repo:baseurl=https://mirrorcache-us.opensuse.org/update/leap/$releasever/oss/