All communities won’t show up on instances automatically so it may be that you’re the first person on your instance to ‘subscribe’ to that community! In my experience with lemmy, you can simply add /c/community_name@instance.tld (TLD=top level domain) to whatever instance you’re at and that should pull that community in, but it could take a few seconds.
This example url would access the /c/general community @lemmy.world from lemmy.zip:
lemmy.zip/c/general .world
I’m still learning all of this too, so I’m sure there’s a better way - hope this helps some though!
Roll that beautiful bean footage