You don't have to be a teenager to be featured in teen vogue. Just interesting to teenagers (and I can understand why Vivian has the spotlight on her).
Also, that's not how genetics work. Vivian is the result of that specific egg and sperm. She never would've been born with XX chromosomes. Someone else would've been born.
If we want to laugh at Musk though, we can point out how the venn Diagramm of autistic people and trans people is practically a circle. Musk trying to select all "males" during IVF was always doomed to fail, especially the more kids he had. He's so dumb and desparate for control he thought he could pick his kids' identities through their very genetics.
I hope Vivian has a kick ass life just the way she is. :)
I exaggerated for comedic effect, sure, but it is true. There is a statistically significant number of people who are autistic and identify as trans/non-binary as compared to neurotypical people.
https://www.nature.com/articles/s41467-020-17794-1