resulting from the mismatch between her sex assigned at birth
He wasn't assigned a sex at birth. That happened at contraception.
I think you meant
conception.
Now, what I don't get is, is this a he trying to be a she, or a she trying to be a he, or one of the other 50-odd varieties of confusion?
Seems like it would be easier to put the bowtie on the Chevy than turn it into a Ford.