The court case where the boy was removed from his mother because Mermaids had convinced her he was trans at age 3 is something of a read.
The small boy (I think aged 7-10) was taken into care and won't ever be allowed back to the birth family. His DM insisted he was a girl, deadnamed him and dressed him as a princess toddler, with the enthusiastic agreement of the social worker - the child was already on CS radar (surprise, surprise).
Over time, various officials complained, as did the poor little boy who told anyone who would listen that he wasn't trans. CS let slip they hadn't checked that Mermaids, who were very involved with DM, and DM, were treating a genuine case.
DM and Mermaids wouldn't back down. No evidence existed at the time, and never appeared, that DS was trans.
DM was warned several times by the court, and eventually bosses at CS, that she had to provide adequate parenting for DS, including clothing him in school uniform and not a tutu, etc. And she had to feed him, etc. They made it clear she would lose her son and tried everything, at vast expense, to keep the pair together.
DM and Mermaids were outraged and launch a vicious attack on the CP system. DM persevered. She lost DS. The judge said, while terribly sad, he wasn't safe with her.
I don't know if he went to relations or a foster family, but he's never coming back.