I used to have issues with my own gender, I know people who did. My issues were ironed out. Some of my friends had their issues ironed out, and I know a few people who admitted in the past they briefly identified as transgender. Again, I also know people who still identify as transgender and I actually fully believe them when they talk about their dysphoria and bow it affects them. I can see why in this case, a sex change operation would be necessary. The latter person did say they'd also be happy if there was a cure for dysphoria to make them be happy with their sex, but there isn't and they're not. So I'm not too sure about all of this, as someone who was placed on a bit of an "escalator" by friends and people online when I was younger.
For what it's worth, I do think it's worth asking children why they want to be the opposite sex. For me it was a matter of shame. I know that some others felt similarly, that we didn't fit society's stereotypes. I believe this can be addressed by showing people how men/women don't have to be conforming to xyz. At the same time, I believe genuine gender dysphoria exists and such a thing won't work with people who have it. Which we have no known cure for. I'm basically mainly shaped by my own experience growing up in this society.
If puberty blockers truly don't cause irreversible changes, then I don't have an issue with teenagers being administered them if they are determined to have gender dysphoria. Some people say they do, some people say they don't. I'm not qualified to speak on the scientific aspects, just my own ethical and moral aspects of it.