Nobody says that capitalism requires liberalism, and as you have mentioned yourself, there are plenty of examples of non-liberal capitalism. However, I am not aware about even single country with communist party in power, which was in any way “stateless”. Quite the opposite. And there were/are multiple examples.

And while there “is” such thing as anarcho-communism, it is “is” as any other utopian fantasy. But I think it is a pleasant fantasy for many people, thus, they are attracted to such things like fediverse. So, I see your point.