Please share with the lemmy.world admins that i don't want to be defederated with lemmy.ml then too. OP should really ask their own instance admin though, what the hell.
General consensus seems to be that, yes, .ml is problematic, but also it's not going anywhere due to being the OG lemmy. Too many vital communities are there.
Hex bear and Leningrad are both defederated. Just lemmy.ml isn't which I have blocked. Mostly because it's annoying ending up on one of their communities and then having them get all upset when you point out basic facts.