lemmy.game-files.net sees you. I think at this point you can safely assume you are federating fine. To be fair though, that is more a testament to your instance federating with lemmy.ml and lemmy.ml federating with others as you posted to asklemmy@lemmy.ml. Might also want to see if you can find other instances with test communities or posts and see if you can create a post, or add a comment from your instance to theirs.
fucking no!!!