These arguments re China and Rojava are relevant because same sex couples will miss out on state benefits and protections without state recognised same sex marriage. Anybody can throw a fun ceremony - I don't think either China or Rojava bans that.

In the case of the Zapatistas, which anarchists probably support more than Rojava, this argument is kind of moot because I'm not aware of state benefits or protections since marriage isn't really a thing their minimal/nonexistent state cares about