I no longer see a the libraries tab which means I cannot trigger a rescan.

[TheDreadPirate]

Circling back to your opening post. Why do you think you aren't logged in as admin? You can't access the dashboard?

You can try re-enabling the startup wizard to reset the admin account.

Stop Jellyfin. Then navigate to where you mounted /config and open in a text editor /config/config/system.xml. Set "IsStartupWizardComplete" to false. Start Jellyfin. Access your Jellyfin in a private/incognito window and go through the steps for creating your admin account. This will over-write the admin account credentials, but no watch status information is lost. Just click next until you reach the end.