I mean if you don’t teach kids about sexual reproduction you can’t then be upset when they don’t have it as part of their foundation knowledge.
So yeah, as part of that syllabus they should be told that there are two sets of partners with gametes, the foetus gestates inside the female sex organs. The two sets of sex data can result in any combination of DNA, including around 30 known combinations of X and Y chromosomes, but that they’re all essentially still X and Y, which have the easiest time procreating further.
But people don’t want to tell kids that incase they gasp want find out how to have sex and then want to do it. And religious education is largely to blame for this withholding of information and many of the taboos and controls around it, however nice Jesus was, a lot of crap had been done in his name to control people.
So the biology gets overlooked and the gender expression/cultural/social/personal aspect gets prominence, in opposition to these controlling and excluding narratives. Narratives that make it rebellious and affirming to say: “oh if you like barbiedolls and were observed as a boy at birth it must be because you’re really a girl inside, let’s make the internal feeling into a physical reality for you” and people to agree as they feel like they’re failing to live up to such narrow definitions of normal.
And really the individuals relation to their sex and identity absolutely should be discussed and explored. Some people are same sex attracted some are not and there is a huge spectrum and we must let kids know it’s ok to ask these questions and feel these feelings. Does anybody really think it’s better to teach them that homosexuality is a sin and they will get murdered for deviating from a very narrow set of expectations?
So no OP I don’t mind them being told that, but I think the context is not as rich as it should be and we do them a disservice by taking the biology and mechanics of it off the table in those pshe classes.