It’s too late to edit my post above but I see from looking at your previous posts that I misunderstood your situation a bit. You are involved in some great activities. No, you’re not involved in “the type of activities that could almost “guarantee” a place in HYPSM” - but I don’t believe there are any of those type of activities. As we’ve all been saying, it really just depends on what the school is looking for and who applies. You can’t predict it. You just build a good list of safeties, matches and reaches and do your best to express who YOU are to admissions. Personally, I think being genuinely interesting and being involved in activities you care about is more important than being in the “right” activity.
Please do not go into the admissions process feeling like there is just one or 2 “right” schools for you - especially based on perceived prestige.