speculation:
canal that is mistaken for vagina at birth
I agree.
I read some of these posts and wonder how they were supposed to ID these people as XY at birth. Having been through the births of two daughters, I can assure you that the doctors take a look and declare a sex. From that point on, they were raised as daughters.
I am sure it took years for the parents to recognize that something was “wrong.”
The need for a standardized process is clear. But, I sympathize for these two fighters as they are not the “trans guys trying to be girls” that we’ve seen in the US.