Here's a link. https://twitter.com/JudiciaryUK/status/1333732359804489729?s=19 … Do have a read, it answers all your questions and it lays it out very clearly.
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Yes- theres no physical danger to the body in going through puberty early. As with gender dysphoria the negatives are social and emotional.
Which doesnt mean they shouldn't be treated! It's very stressful on a young person to appear different from their peers. And they may be treated differently by others as well. But these aren't physical issues, they're psychological/psycho-social.