It's not natively supported in Lemmy yet but lots of third party apps can. If you're on Android Sync and Connect both support it.
You're not wrong about the tankie thing, I'd say it's the major conflict in the "threadiverse" right now.
As you can see, I'm on lemmy.ml on this account. The moderation of the server is definitely weird. Since it is the flagship server there's more diversity of thought than you would expect.
If you want to avoid the tankie trolling and brigading the instances you want to block are lemmygrad.ml and hexbear.net