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.
Are you aware of piefed instances? I don’t know the instances there or why someone would even use it over lemmy.
Not as much, personally. Piefed is even smaller than Lemmy from what I know. Most instances seem to be Piefed versions of existing Lemmy instances.