We have girls identifying as trans in both family and among DC's friends and I understand why you are concerned Sirranon. Navigating this issue alongside all the other teenage issues is not easy.
I do not use preferred pronouns and have explained why I will not allow others to control my speech and why they shouldn't do so either. Given where I come from and my personal experience, I can give them ample evidence of where that leads. I do not care whether they condemn me for it. Or anyone for that matter. A childhood spent in a dictatorship without freedom of thought, expression or association means I do not accept anyone denying me those rights in my life now.
I use sex-based pronouns when the children in question aren't there, and avoid pronouns when they are. As we know each other, they know this isn't because I deny their existence or wish them harm. More importantly, the parents are doing this, too. I think it would be harder if they were full on TWAW though.
I do use preferred names, but one of the children has tried out several already, and I struggle to remember names at the best of times. Which everyone knows, so they do understand I'm not making a point about names. (I now also struggle with faces and have problems recognising even some family members when they have a mask on.)
With my own DC, we continue to have conversations about why I believe that the doctrine of gender identity is harmful, particularly to women and children. We talk a lot about science, about equal rights and how the balancing of rights works, and when necessary we discuss the lack of robust evidence on the efficacy and safety of puberty blockers, cross-sex hormones and cosmetic surgeries.
There is nothing wrong in my view with sharing your opinions on these issues and nothing wrong with letting your children know that you disagree with their view. I encourage my children to present their views where they disagree with mine in a respectful, open debate. I let them have the last word. I don't shut them down, not even when they regurgitate some really offensive (usually misogynist) stuff that is often used in the debate by believers in the doctrine of gender identity.
I did rather pointedly have a critical thinking printout on the fridge door for months and frequently referred to it to encourage them to question both my and their own views using those techniques.
None of that avoids the emotional rollercoaster than any disagreement with a teen can turn into. But it all sinks in. The voice of your child's conscience is your voice and even if your daughter will deny it until she's blue in the face, what you are telling her will leave an impact on her way of thinking.
Just remember that you are modelling how to handle disagreement and that if you teach her to listen to other viewpoints by listening to hers, she will benefit in the long term (and your relationship will too).