I've been trying to attract Wiki Admin or Bureaucrat attention since November 2019 - I've posted various issues (incl image db errors) on the Wiki Feedback page and a couple of Wiki Admin and Bureaucrat talk pages with no result.
Is there actually any active Wiki Admins or Bureaucrats?
Yes, however the forum is mostly an end-user to end-user resource. So the relevant people may not hang out here. The mailing list usually is a good place, if a question to the team goes unanswered here.
Sometimes someone pings the relevant person. The wiki admin is so rarely needed, that probably no one knew whom to notify. In fact, I wasn't even aware (I forgot) I had the privilege...
I removed the dead links.
Edit: the various localized main pages may still have the links. But they seem not to be protected...
Additionally, there is a longstanding bug in MediaWiki which requires the manual running of a script to update the category links and this can only be done by someone with command line access to the machine on which the Wiki is running.
I think server maintainer (shell access) is someone from the FPC team. Not 100% sure myself.