The kid expressed the desire to be a girl- it was one of the first things he communicated to his parents when he learned to communicate. As he got older, it got worse. He started threatening to chop his dikk off. His parents didn't know what to do, so they took him to a psych specialist. They didn't want to let him get a sex change so young, which in my opinion is the responsible thing, so they went the route of using medication to temporarily delay puberty in him, the idea being that this would allow him to figure himself out without allowing his mental issues to get worse by further widening the gap between his self-image and his physical body, while also not letting him make any lasting changes to his body he might regret later. Therapy would be used to help him come to terms with himself, then, when he had decided whether he wanted to be male or female, at an older age, he could either transition or just get off the medication and experience puberty normally with no side effects or issues down the road.
Somehow, this has been twisted into the lie that the parents are forcing and encouraging him to get a sex change. That's exactly what they AREN'T doing.