Genital surgery typically isn't performed until the child is at least 16 years of age, usually older, but 'gender-affirming' breast removal is being done to female children as young as 12 years old.
There's increasing scepticism as to whether social transitioning is reversible in practice (see the interim report of the Cass Review for more detail on this), and the long-term adverse effects of puberty blockers are currently unclear.
This is part of the reason why the health authorities in many countries are starting to halt or restrict the gender-affirming approach, as it may be causing more harm than good to gender non-conforming children.
There's increasing scepticism as to whether social transitioning is reversible in practice (see the interim report of the Cass Review for more detail on this), and the long-term adverse effects of puberty blockers are currently unclear.
This is part of the reason why the health authorities in many countries are starting to halt or restrict the gender-affirming approach, as it may be causing more harm than good to gender non-conforming children.