I don't know, but I've been very shocked at how little attention parents seem to give to teaching their children about sexism, feminism, misogyny, gender issues throughout nursery and primary school, compared to when I was a child living in the same area in the 1980s.
Our nursery was brilliant: any gender stereotyping (e.g. girls must wear pink, boys only football girls only dolls) was not allowed (it was in the nursery contract and rules) immediately noted and discussed age appropriately.
Primary school seemed less onto the issue until years 5 and 6, where they had excellent classes on equality and gender.
Parents, however, seemed either entirely uninterested or were actively working against this, teaching their children that boys and girls have innate traits and abilities, e.g. "boys don't cry," "girls are more empathic," "men are better at coding."
This was alongside with ignoring or encouraging aggressive behaviours in boys, mostly laughing it off as "boys will be boys."
My own son is very quiet and shy and the local dads would comment or mock him (then just walk off when I stood up for him).
I taught my son about sexism and feminism from age 2 or 3. He knew Cbeebies was biased towards male leads (Octonauts anyone? 😆 over the top, maybe, but it really is important to notice these things), knows how to do the Bechdel test for video games (they tend to fail) and how these hidden biases we take for granted have immense influence on everyday life.
Now in year 7 he's at unfortunately very sexist all boys' state school, but has already written about women's oppression in an English exam. He rolls his eyes and says, "I know I know" whenever I mention these topics, bit at least he's taken it on board.
It does help that his dad does a lot more housework than I do and tells him.that what I say about sexism is true.