Children's sexual orientation and gender identity are not something that can be changed. There has been no legitimate research that shows that conversion therapy is effective. I have tried most of my life to not be transgender. I have gone through many therapists and spiritual practices to try and not be transgender. My issues with my gender were not resolved until I transitioned. A transgender child will go through a fairly straight forward social transition involving new clothes, new name, new pronouns, and a new haircut. There is no medical intervention until puberty and not without consultation with doctors and therapists. The therapist is involved not because being trans is a mental illness, but to support the child in finding what they need. 

Being LGBTQ+ is not something that needs to be fixed, the children need our support, not conversion.