<p>Well being a girl helps in terms of engineering admissions because it’s mostly dominated by males.
Likewise being into the humanities and arts helps in some ways because she comes off more well-rounded then the typical engineering applicant. </p>
<p>With that said the worrying aspect for me is, like you said, that she hasn’t developed an app. Typically people who enjoy theater or drama would not be interested into spending hours behind a computer screen writing code. If her hobbies outside the classroom have been humanities based why would she suddenly turn 100% and became STEM? </p>
<p>You should get her to start writing code right now and see if she really likes it. </p>