@historyincognito This conversation reminds me of the day my mum marched me into my psychiatrist's office and told him that I was having sex. I was 14, and she expected him to explain to me why that's not a good idea, and convince me not to do it again. He told her to buy some ear plugs so that she didn't have to listen to the noise.
It's very unlikely that her therapist will comment at all about her behaviour if they think it's not good. That kind of feedback just isn't helpful, and it would be likely to ruin your daughter's trust in the therapist (make her feel judged, so she doesn't feel safe enough to be honest). Instead, the therapist will ask your daughter questions about what happened, how she feels about the outcome, and how she would handle it differently next time (if at all) to achieve a better outcome. The questions will be designed to help her develop new strategies and skills, so that she is more likely to achieve a better outcome, but your daughter will be the one to identify her own goals, and as far as possible, come up with her own strategies to achieve the outcome she is looking for. It works because the motivation to change comes from her, and she is more likely to be able to put her strategy in place if she is the one who came up with it. If the therapist makes specific suggestions, it's usually because they have some special knowledge or expertise that's relevant to the situation. They won't be trying to guide your daughter towards what they consider to be better behaviour unless your daughter has already identified that as a goal.
It's fairly likely that one of your daughter's goals will be to get along better with you, though. The therapist will have a fair idea of what your perspective might be as a parent, and they are likely to advocate for you simply because that will help your daughter understand how to achieve a better relationship with you, but your daughter has to be driving it.
You're much more likely to get the results you're looking for out of family therapy, because you will all be working towards the same collective goal. Don't expect the therapist to just take your side though; they will give both(all?) of you stuff to work on.