User blog comment:Kirkburn/Introducing the Community Page - a hub for community info/@comment-25523075-20160707210313/@comment-24722583-20160710012222

The Community Page has only been implemeneted on the top 5000 communities on Wikia, as stated in the second sentence of this blog post.

But, as Kickburn said in the comment below, you can let the Wikia staff know that you'd like to have a Community Page on your Wikia via Special:Contact/general.