It's fascinating isn't it.
"...Each person’s self-defined sexual orientation and gender identity is integral to their personality and is one of the most basic aspects of self-determination, dignity and freedom...States shall:"
Sexual orientation - As animals we have a drive in general to have sex to procreate. Obviously it gets more complicated than that but essentially, fancying people and wanting to have sex with them is a thing that is fairly universal - for sure there are sexual people and the focus on sex from a male perspective throughout history is a bit of a bummer, but even without all the external stuff, teenagers will still have sex drives and most of them will fancy people and so on...
Gender identity... Now I question whether this is universal. It's hard for me as I have literally no idea what this means. So it's like - I'm an athiest, I went to a religious school, I was always ??? about it. I just don't have the capacity / whatever it is that makes people want / need / feel meanings and reasons beyond the here and now. I know that lots of poeple have this spiritual feeling - but I can't imagine what it's like. Another one - I can't see things in my "minds eye". Apparently most people can do this (I only found out recently). I had no idea that something was not "normal" as I've never lived another way. I can't imagine what it is like to have this. So, internal gender. I do not have this, I can't imagine what they mean. So, when they assert this is unusual, have they checked? Who have they asked? Have lots of studies been done to see if most people have this? I mean aside from associating with or preferring one gender role over another (social / societal). This is a thing inside. What is it? I can't imagine.
My guess is that most old school feminists will be similar as we are the ones who notice how ridiculous gender (sex role) is when we are young and therefore say this is stupid and work to get rid of stereotype etc. Many feminists are GNC, one way or another. This is one reason we notice how we are treated based on our sex. Because we are NOT comfortable with our gender role.
Anyway my point is that the idea of an internal strongly held gender ID being a global, always, basic thing that pretty much everbody has is unproven and as a person who does not have it, I struggle as what on earth do they even mean, I can't begin to imagine.
This is putting the cart before the horse and you know what if it turns out that most people do have a strongly felt internal sense of gender (unrelated to sterotype or sex role etc) then OK. It still doesn't get rid of the oppression of women and girls around the world who are oppressed based on their SEX, any internal sense of gender is wholly irrelevant to tackling that.
I have seen online the idea that it is not people of the female sex who experience oppression but "femme" or "feminine presenting people". This idea erases the entire factual experience of women and girls across the world in favour of including GNC men in the group. Women and girls across the world cannot escape what will happen to them due to their sex, by donning a pair of trousers, cutting their hair and saying they are called Dave. Well, I tell a lie, some can (see girls in Afghanistan whose parents do this so they get educated) but in general it is the fact of our sexed bodies and assumed reproductive capacity that causes all the trouble, not because we are "feminine". GNC women get loads of shit FGS let's just turn a blind eye shall we?