I’m aware of some stuff like that some instances have defederated from others for anti-communism (lemmy.world / hexbear.net), but that’s where my knowledge ends.
I’m looking to understand what instances to be aware of, each instances’ political leaning, defederation etc.
Hexbear fell back to chapo.chat for a period. Others could view old Hexbear posts, but federation broke until it was resolved. The domain is fixed and Hexbear is federated again.