I know what you mean, I read quite a few books featuring crossdressing girls as a kid but not so many nowadays. Perhaps it is a kidlit trope in particular.
She Who Became The Sun is a recent SFF novel I liked about Zhu who crossdresses and pretends to be her brother in order to survive, then grows into her own identity and power while continuing to pass as a man. She also falls in love with and marries a woman. Very gendery book!
For a VN flavour, the MC of Ladykiller in a Bind spends the game pretending to be her twin brother. Although that one does not have the 'girl excelling in a male field' vibe.
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She Who Became The Sun is a recent SFF novel I liked about Zhu who crossdresses and pretends to be her brother in order to survive, then grows into her own identity and power while continuing to pass as a man. She also falls in love with and marries a woman. Very gendery book!
For a VN flavour, the MC of Ladykiller in a Bind spends the game pretending to be her twin brother. Although that one does not have the 'girl excelling in a male field' vibe.