Well, firstly, it's clear that you do have preconceived ideas about gender which you've exposed them to - but I think you'll say you don't, so let's leave that aside.
What do my preconceived ideas matter, if the boy just inherently clonks his sister? I've subconsciously gifted this to him? Or is that just what my boy (and pp boys) are inherently like. He hasn't got it from the TV. He hasn't got it from me. Or dad. He just does.
I have, by age two, conditioned only her somehow to sit and concentrate, but I didn't bother with him because I love having to still chase the other one around. Or she just inherently does this, and he doesn't?
Do they not ever watch tv
Yeah, mainly despicable me, in which there are no little boys.
do you not read them books
Only recently. One about "that's not my dinosaur" and another about trains and birds. We don't read a lot. We play with a lot of Duplo and "building" things.
do you dress them identically?
Nope. They both wear tops and trousers because it's easy. Today, she's in grey and yellow, he's in orange and black.
Have you really not taken them out of the house?
Nope. Everything's been closed or the rubbish "covid" version of open. Book, come along, get out before the next people arrive so we can sanitise. They go to the supermarket with me, and for walks at the forest. Not much else. Will do a few more things in Dec providing no more restrictions come in.
What about their sibling?
Much older. Leaves for school before they get up. Home around an hour before they go to bed.