I don't think the labels are meant to be all-encompassing - all of the categories have significant amounts of Ukrainian supporters. Most self-identified antifa, I would say, would be Ukrainian supporters, as would most self-identified communists who aren't tankies. It's more "Genocide apologist + [A,B,C,D,E] most likely means this".

Yes. This image is claiming that some people who support Russia/oppose Ukraine self-identity as anti-fascists and argue their point from that perspective. Not that those people represent everyone who would identify as anti-fascist nor the majority view of anti-fascists.