I don't even understand why you would be asking this question. One reason they aren't gotcha questions is they can't possibly "get" anyone.
1. Liberals think trans and abortion should both be legal and available. So there's no question of hypocrisy. It's not as if we are saying, "trans people should get care, but similarly situated cis women shouldn't." We're saying, "everyone should get care."
2. Whether or not the child makes the decision by theirself or has parental involvement doesn't seem like an important issue in this debate at all. What about the position that "it's not the state's business" is taking sides about whether parents should be involved? That's not the issue. I mean, if you want to make it the issue, I don't really care. It would change nothing, because parental consent is already required. It's required 99% of the time for medical care for minors.
3. The reason that abortion is treated differently -- well, one reason I suppose -- is that parents often have ulterior agendas on this one. Some significant percentage of girls who secretly get abortions are impregnated by their father or a c
Does this answer your curiosity questions?