I don’t think there are like true hermaphrodites in humans (as in people’s capable of doing both reproductive roles). Also, people with DSDs don’t have anything to do with trans people and it’s dishonest to pretend they do. I feel like for your second question you are misunderstanding what defines sex. Just because someone can sterilize themselves and take on certain characteristics with hormones doesn’t actually change sex. Like, if I could have had gene therapy or gone through some other process that made it where I was able to naturally carry my husband’s child because my body made eggs and has the necessary parts, I feel like there would be a different conversation, but that’s not where we are. We can change some phenotype stuff (although you already sort have to be a little abnormal for your natal sex to really make that work well), but it can’t change our reproductive capacity.