Code for people interested https://codeberg.org/rimu/pyfedi/src/branch/main/app/admin/routes.py#L373
I commented it out, rebuild the Docker containers and it works now 👍
EDIT: People seem to misunderstand what it does. It prevents it from federating automatically when populating the community search, importing from another instance or from Lemmyverse. It’s not a full block, and you can still add it manually. Not only that, but it’s also already partially removed since I posted this.
Yes, every other instance would also refuse to federate unless they also changed their code. Because the blocklist is baked right into the code, so anyone just pulling and running it as-is will fail to federate.
It’s odd that communities with those names load if they’re hosted on Lemmy, tho. Or maybe I’ve just only been on Piefed Instances that undid the list.