Board Thread:Support Requests - Getting Technical/@comment-43863641-20190925122040/@comment-4772526-20190925124448

You can customise the navigation bar on the page MediaWiki:Wiki-navigation for the wiki in question, however doing so requires admin rights. The help page Help:Navigation goes into more detail on how the navigation bar works, and in particular you might find the section Customizing your navigation useful.

Hope this helps.