Lemmy Support

Hello, I wanted to ask what you have to do to be added to the join-lemmy.org page? Is there an email to call? The documentation only reads that you have to meet certain criteria, but is it then added automatically at some point?

I'm new to Lemmy and trying to understand how the All feed works. Doing some reading it looks like it is populated by communities that people on the instance I'm apart of have join. Is that correct?