Board Thread:Support Requests - Getting Started/@comment-45670318-20200609042617/@comment-168424-20200609205155

You can see the code used for their menus here: https://ajplaywild.fandom.com/wiki/MediaWiki:Wiki-navigation?action=edit

The Blog posts one is specifically this:
 * Project:Community Portal|Community
 * Blog:Recent_posts|Recent blog posts

So you would edit the same page (tt>MediaWiki:Wiki-navigation) on your wiki to add it.