Breen v Johanna Olsen-Kennedy is one of the biggies. J-O-K is a titan in the provision and promotion of GAC, prominent L.A. surgeon, WPATH president. Brutal case, If she loses, the dam will break, expect an onslaught to follow.
Others include Chloe Cole v. Kaiser Permanente, which has been punted for a while, but has not ended. Ayala v. AAP and several doctors. Someone anonymous is suing Planned Parenthood...there are several more, but similar themes in all: rushed diagnoses and interventions, inadequate mental health assessments, and claims of coercion or misrepresentation of risks (e.g., fertility loss, irreversible physical changes).
There was also that lawsuit brought by trans advocates challenging Alabama's GAC for kids ban, which blew up in their faces in discovery when the whole WPATH house of cards was exposed. ACLU attorney and trans super hero Chase Strangio himself, excuse me,
herself, admitted under oath to the Supreme Court that the whole suicide narrative is not true. That's the "Would you rather have a dead daughter than a trans son" coercion used on desperate but inadequately informed parents in an effort to sell them an induced endocrine disorder and a radical mastectomy that will guaranteed harm their kid.