Yeah, every anti-natalist I've ever read or spoken with cared much more about "overpopulation" than the issue of consent at being brought into existence. Anti-natalism is without any doubt very strongly tied to malthusian nonsense even if some of the more philosophically educated among them like to couch it in terms of sentience and consent. To think otherwise is to completely misunderstand the movement.

Edit to clarify: I know that there are plenty of people who exist who hold the position that what is problematic is that life inherently involves suffering and so bringing it about is causing suffering which is immoral. I'm even somewhat sympathetic to that view even if I don't agree with the very premise of it. But I've (personally, anecdotally) never seen those people refer to themselves as anti-natalist. However those who have self described as anti-natalist and certainly any of them who considered themselves part of a movement were eco-fash adjacent malthusians. The overall anti-natalist movement is deeply entwined with and cannot be separated from malthusianism.