I messaged Mermaids about this earlier and the person I talked to was quite dismissive of this. They said that lots of trans people have trauma from the past that makes people doubt that they are, but that they are almost always trans and it's almost always unrelated just makes people doubt them
I am actually pretty alarmed by this.
Firstly this is a charity under investigation for failures of duty as a charity. It has had multiple safeguarding incidents.
Secondly I question what medical qualification this person has and how they can say this. It's a safeguarding fail. They have not assessed your daughter or even had contact with her. They've got a preset agenda they want to push. There is literally no evidence for this. Indeed the Cass Review says exactly the opposite and highlights how trans identifying teens are a complex heterogeneous with multiple needs rather than a homogeneous group. It also says that detransition is common. Something that this person from Mermaids isn't even giving you information about.
It's irresponsible, dangerous and misleading.
This is about those volunteering for Mermaids have not got appropriate experience but do have their own political agenda which they wish to push onto these kids rather than give accurate impartial advice in line with independent government report and the current NHS position.
They really should be reported to the charity commission AGAIN for this.
(I actually hope a journalist picks up on this and does so digging because it's clear there's still a MASSIVE issue with this charity).
I really don't have many words of advice to add to what others have already said, but to say in the strongest terms to avoid Mermaids again (and if you feel up to it, consider complaining to the charity commission about it but totally understand that you may not want to do this).
I hope you and your daughter find a way through this.