@Moomoominla I went through a really, really difficult time with my daughter some years ago (not trans related, it was grooming/ SA related) and my daughter eventually came out the other end - she eventually realised that what had happened was not right, even though it didn't feel wrong at the time.
It may be a bit cheesy, but I'm often reminded of the old The Byrds song
To everything, There is a season. And a time to every purpose under heaven
A time to build up, a time to break down, A time to dance, a time to mourn
A time to cast away stones, A time to gather stones together
A time of love, a time of hate
A time of war, a time of peace
A time you may embrace
A time to refrain from embracing
A time to gain, a time to lose
A time to rend, a time to sew
A time for love, a time for hate
A time for peace, I swear it's not too late
It's the worst feeling in the world to see your child go down the wrong path, but do what you're doing, carry on loving your daughter and things will turn out as they should in the end, even if it looks hopeless now.
Something - - or someone - along the way will make the difference and set a change in motion and you will get your daughter back. This is part of your daughter's learning about life and there's nothing you can really do while she's learning - just be there, because that's what's important - and she IS going to need you to be there.
And a Happy New Year to you too 💐💐