Right after saying that they loved being called a guy and saying how much they want to be a guy. I've talked to a fair few of the "I'm not trans i just really want to be seen as a girl/boy" types who go on to transition.
First, All her pronouns are she/her she still has people refer to her as such. Even if she were trans or NB you use different pronouns only when they personally identify.
Second, Thats an interpretation I guess…though a very loose speculation.
1. The definition is too strict
For instance, tomboys and femboys exist. Who feel more comfortable cross dressing or being treated like the opposite gender yet, don’t actually transition.
2. The author is unlikely to do that. Simply most people in Japan that care about this are small as, its not really a mainstream issue for them like the West. And the people who care about that stuff are moreso gonna pickup genderswap mangas instead as, they know the issue is addressed before going into it.
Too just all of a sudden add her discovering being trans especially when she isn’t even a main character is unlikely to put it lightly and rather her wording seems to be an attempt to prevent people from assuming she doesn’t want to be a girl.
3. Her allowing other people to refer to her as a girl, yet taken issue with “me being
simply a girl” seems to imply that she doesn’t have problems with being a girl itself, but rather that only being a girl restricts her from being able to quite possibly engage in her boyish hobbies or goals in life.
Japan is very traditional and women have only joined the job market in very recent years so culturally it is an issue that would make more sense to address. Such as a tomboy evading being seen as a woman because she’s thought all her life that more emphasize is put on the man supporting the family and the leader of the family. Causing her to want to act as a guy because she thinks being a guy makes her gain more power over herself than being a woman.
4. The raws confirm she isn’t trans, NB, or gay