If I had been told twenty years ago that sexist stereotyping will be supported by left-wing papers in 2020 I would not have believed it.
The rugby article at least addresses the issues, though some of the language is based on definitions forced on us by a very small minority, however marginalized. I am not "cis" but a woman.
On sex vs. gender in sports, the true underlying reason for sex-segregating many sports is that the male and female bodies differ, on average, and that trans women will have characteristics from the male distribution, not from the female distribution. The segregation has nothing to do with one's gender identity. Indeed, it would be meaningless to segregate sports on that basis alone.
I understand that the problems all this creates are difficult and involve competing rights, but the rights of millions of girls to have fair competitions surely should matter just a little, too.