Hi OP.
I can sympathise. It can be very difficult to have these discussions sensitively at this age. Particularly if they have trans friends at school as my teen does.
I would start asking whether they believe all that they read about 'new' science. We have always tried to teach critical thinking in our house and to go to original sources. And have a discussion about how people can believe in pseudo science and believe that theoretical science should be taken as being proven science. This covers a range of things like climate change denial, like the earth is flat, like whether schools should teach creationism vs evolution.
One way to have the conversation is to ask her what she believes being trans is. What she believes defines womanhood. What she believes TWAW means and if she has any limits to where gender can be prioritised over sex (ie. where does she think sex matters, if at all).
If she is telling you that there are no limits, and that there was no doubt that Laurel Hubbard should have been able to compete as they did, it could be a good time to look up the graphic that outlines the physical advantage that males have.
It may be that there are areas that she has not yet considered regarding single sex spaces, but I know my own teen is very naive and cannot see that other girls and women may need these spaces to be remain male free.
Either way, you will need to find a way forward or simply not discuss it at all or agree to disagree.
Sometimes it is having an opinion that is different from mum's or dad's that is causing the emotional reaction. Sometimes it is a deeply felt opinion. Sometimes it could also be the cognitive dissonance of knowing that sex cannot change yet people are pressured to believe that it can. And that social media and thinking in convoluted theories (such as if hormones and cosmetic surgery can change 'enough' of the sex markers then that person has 'changed sex' enough to be called the opposite sex and sex is spectrum etc) is telling them that this is new way of thinking and that 'old' people have no idea.
We see it here a lot.