Short answer is no, I think. Here’s the long answer. Take a look at Allen Cheng’s (successful) Harvard application file. They wrote a big red A on it by his name, and by both of his parents’ names, so I don’t think that it was for “admitted”. They might wonder about Pacific Islander if both parents were born in China, but hey, I’ve had friends whose 4 grandparents were Ashkenazic Jews, but one parent was born in Mexico, and they successfully claimed they were Hispanic. So I guess that you could get away with claiming Pacific Islander if one ancestor came from there originally. Anyway, Cheng’s advice is to concentrate on developing the biggest “spike” that you can, so that you would stand out from other applicants. I can tell you that my kid’s music spike seems to have compensated for an unweighted GPA that must have been like yours. Mostly A minuses in all honors/AP, occasional A or B. Kid did have a 36/36/36/34 ACT.
We didn’t find Cheng’s online advice until after the application had been submitted, but it turned out that kid just naturally fell into it by being highly successful at developing a big spike in music, because kid loved doing that activity, got very good at it, won international contests, participated in highly prestigious youth music programs (the kind that people move across the world for, so that their children can participate), had letters of recommendation from prestigious, highly -respected musicians.
I don’t know whether your playing at Carnegie Hall a year before high school in a fundraiser is a high school extracurricular. Did you win a well-known national competition in order to participate? Or was it a money-making competition/event - sort of like the “prestigious leadership conferences” that all students get invitations to and that are really just to get parents to pay a lot of money for their kid to attend. In any event, it was in 7th grade, and if you haven’t continued to play and make further achievements in piano, it might not be considered impressive. How does this accomplishment make Harvard want you? Are you at the level that you would be an accompanist for some of their many music ensembles? Have you continued and progressed with this skill?
Which of your activities is your favorite thing to do? What do you love? Perhaps you can develop this into something bigger and more impressive, before application time? From what I can see, most of your activities are at the individual school level. Most successful applicants whose parent isn’t donating bazillions, are one of the best in the country at some particular skill that either Harvard wants to have there (recruited athlete, highly talented and accomplished musician, national level winner of science/debate/etc. competitions, published author, researcher, etc.), or that Harvard believes will be a future leader, by virtue of the family they come from, or the promise they have already shown.
If you think that you can develop one of your extracurriculars into something really impressive, and you would really love doing it, then sure, go for it.