Guardian Australia, so the comments are at least partly from Australians, who don't seem to be wholly on-board. The article used all the tropes of "administrative violence" and "coercively assigned gender at birth without consent" but most readers weren't having any of it. The top-rated comments are really very good and definitely gender-critical.
As for comments being closed, this is par for the course with The Guardian after a couple of days and this article was 4 days ago. It costs money to moderate and money is scarce at The Guardian,