I think everyone is different, blanket answers are just stupid because we all become aware of our attractions and sexualities at different ages. I definitely had crushes and noticed women by the age of 7 (I’m a lesbian). When I was 7/8 I got Titanic on VHS for a Xmas present, I remember getting up early on weekends to sneak downstairs to watch the part where she’s topless. I also used to have crushes on women in tv shows and hated it if they had any romantic scenes with men.
I knew there was something different about me because I had no interest in boys or male bodies what so ever, but knew I liked to look at women, I thought this was “wrong” and “weird” so I hid it from everyone, and that’s probably why I remember things like this whereas straight people don’t, because I used to feel a lot of shame about it. If I grew up in todays world not the 90s then I’m sure I would have accepted I was gay and told someone by the time I was in secondary school, because I was very aware of my attraction to women by the time I hit puberty around 10/11.
My SIL’s younger sister came out aged 10, a lot of people didn’t believe her, she’s now 15 and is still very much a lesbian, has never shown any interest in boys has a girlfriend.
My wife on the other hand is adamant she had no crushes and no sexual feelings what so ever until she was 13/14, so everyone is different.
So she might be gay, or she might just be a kid throwing words around without knowing the meaning. No one can know, but does it matter? If she said she had a boyfriend and she’s straight no one would bat an eyelid.