Hello @Anonymous ,
Thank you for posting here.
I found you have posted a similar case before, so would you please confirm if this is a duplicated post?
Here is the case link:
'System' missing in Adminsitrative Templates in GPO n Server 2019 Standard
https://learn.microsoft.com/en-us/answers/questions/334229/39system39-missing-in-adminsitrative-templates-in.html
Should you have any question or concern, please feel free to let us know.
Best Regards,
Daisy Zhou