Confirming same issue from lemmy.ca
I found this one, but wanted to connect the new [email protected] community and am unable to discover. Might be a federation issue?
Edit: Was able to join. As suspected, not fully federated out yet. To solve: users not on lemmy.world need to use their instance's website (not via an app) and search directly for [email protected] and click into the community & subscribe. Once done, it will begin to propogate to your instance as well, helping spread it to others that may be interested.