Hi @Lt. Columbo
When you open the Group Policy Editor MMC snap-in tool and focus on a local GPO or Active Directory-based one, some Group Policy areas that are expected to appear may not be found.
To resolve this issue, re-register the appropriate MMC snap-in DLL that implements the missing functionality by issuing the following command at a Windows command prompt
regsvr32 <snap-in DLL name>
Some Group Policy areas are missing from the Group Policy Editor
https://learn.microsoft.com/en-us/troubleshoot/windows-server/group-policy/group-policy-areas-missing
Here is a thread as well which discusses the same issue and you can try out some troubleshooting steps from this and see if that helps you to sort the Issue.
Administrative Templates completely missing from Group Policy Editor
https://social.technet.microsoft.com/Forums/en-US/e150c6ff-7975-4fbf-8cb7-a9647b8e9a1b/administrative-templates-completely-missing-from-group-policy-editor?forum=winserverGP
Hope this resolves your Query!!
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