GC feminists who beleive it's totally a social construct will still have issue with this I imagine.
I'm not sure feminists see it completely as a social construct; stereotypes evolve from biological reality. It's like the argument "is it nature or nurture;" it's both. Nature first nurture thereafter.
Feminists, particularly if radical, recognise the unique impact of the mother baby dyad, as well as the parent baby dyad. Having a baby physically, structurally, positively changes the brain of a woman for a period of time (2 yrs iirc) Any second parent's brain (male's have been studied) is also impacted the more time they spend with the baby, the more holding they do and in men it's was found testosterone/ aggression levels were reduced.
The positive impact of this on the individual child is then obvious.
The TW breastfeeding thread mentioned the tribe where men may occasionally offer a nipple to a screaming infant (very scant details on that click bait). BUT the key point there is that he does so as they all hold their infants for huge amounts of time, and it's a egalitarian society. The women go and gather food/ hunt. The men hold and care for their babies.
I can't imagine the women do this till baby can last longer without milk. But I am struck by what potential impact this way of caring has on all individuals. Is this why the society is more balanced? Less aggressive?
That's the impact of construct that radical feminists look to. Everything else thereafter is capitalistic construct, products designed "for" males or females and as thus gender stereotyping evolved as sex/gender roles did.
Again, biology is behind a few eg women's body shapes are on average different to male. So need different shoes clothes. It just all got out of control when money came along.