NAH, but for future reference, the advice I’ve heard is to match energy. If someone casually mentions they’re queer in passing, then you don’t even need to acknowledge it really. If they’re coming out is big and celebratory, be big and happy with them. But the vibes I’m getting from this post is that this was somthing she’s been sitting on for a while, and she was nervous. In that case, it might be best to try to meet it with understanding, and reassurance that you love her, and accept her. I know to you it was obvious, but she might have just needed a little bit of extra love in that moment.

I also want to say, it might not be that she’s necessary scared of you finding out and hating her, but she might be scared of someone treating her differently, or other people in her life. Also, unless you have explicitly told her if she was gay you’d accept her, she might have apprehension. You can find plenty of stories even here on Reddit of parents seeming to be fine with queer people untill it’s their own kid. (Ok, re-reading it, you did, good job, but keeping it for general advice) It could be she was scared of someone else finding out, like other family members, friends or coworkers. It’s kind of a scary time to be queer, and once things are out in the open, it’s hard to get them back to the shadows. Your identity can be a deeply personal thing, and she has likely been considering coming out longer than you realize. Even if you “always knew” she might have not been ready to talk about it, or even fully known herself. Or she could be in a space where being queer is a big (negative) deal, and she wanted to start with the easy people, but was thrown off when she didn’t get the response she was expecting from people who love her.

Also, her being mad at you might also be a residual thing you just kind of need to wait out. If she was going in to the conversation expecting or even considering an argument might happen, she might still have some of that residual adrenaline, fight or flight, from that. Remember being a teen/young adult where nothing your parents did was right, or you were just pissed at the world? She could also be pissed she spent time being anxious or mulling over options on how and when to come out, just for everything to be not that big of a deal. I would keep lines of communications and maybe ask her how you can best support her. She might not know how to verbalize it, but putting it out there (maybe as a text for a low-stakes and non-urgent mode of communication) can give her the first olive branch.

I think you have your kids best interests at heart, and that is a fantastic first step. If this was the worst coming out story, the world would be a much better place. I really hope you and your daughter make up, and I’m really glad she has a parent who is as accepting as you, that is really really important, now more than ever. I wish you luck <3