Are there stats that there are more women who career change and come from bootcamps or don't have as rigid technical backgrounds? Are bootcamp graduates not technical enough or interested in technical subjects? These generalizations are unsettling to me.

There's a general flow of conversation in any social situation that organically arises from the composition of the group of people involved. Unless your friend's teammates are jerks, she should be able to easily influence the direction of the conversation. Perhaps instead of suffering from an issue because she is a woman, she is simply too shy. Maybe this industry or society at large is bad at including shy people general.

How would a manager even know where to direct the discussion if the person who feels alienated doesn't speak up during the conversation? The last thing I want is a manager to try to point the discussion to movies, pop music, fashion, makeup, or whatever else women are supposed to like. I would absolutely be offended.