This is the lemmy.ml memes community, so unless I am very mistaken about how things work, I don’t think you found your way here from hexbear all.
If lemmy.ml defederated from hexbear, you would no longer see this community on the “fediverse all” section, just like you cannot see communities from lemmy.world.
The point being, as available communities become fewer and fewer, hexbear users looking for meme communities will probably concentrate on the few remaining to them, instead of being spread out over the many otherwise available.