There are very few opportunities for kids to compete/perform in our area. The very talented kids from DD's school often busk for the performance experience. There's no pressure, it's good practise and they get to earn their performance chops. We have a 7 yo & 11 yo who take their keyboards to the local mall once a month for 2 hours (with parents of course) - maybe that could scratch an itch.
Otherwise, if she has the physical development for it then brass would be my suggestion. Then she can do jazz, pop, orchestra etc so much more in demand.