Some general thoughts on your application process…
How are you building your school list? The schools you listed vary greatly in size, ranking and selectivity. Do you have some idea of what you want to study? Have you visited any of the schools you listed, even just to walk the campus to get a feel for the school’s “vibe”? I don’t know where you are, but it might help you get a feel for what you want by visiting some area colleges, big and small, private and public (if you are in the Boston area this is easy, if rural SD, not so much).
Top tier schools receive far more applications than they have available seats, and many of these applicants are extremely impressive, high stat students. For every student a UPenn or Brown accepts, they might turn away 10 students that are just as accomplished. Being qualified, in some ways, is just the first cut, but it is what you can control. Schools are trying to build classes that meet the school’s goals in terms of background, geographic origin, demographics, etc. - all things you cannot control. Brown may have too many students from New England, and not enough from the upper Midwest so the kid from WI gets in while an identical student from the CT does not. My point here is if you do not get into your dream school it almost certainly isn’t because you fell short; don’t beat yourself up.
So, back to your initial question… the Ivies are a reach for everyone and there are no guarantees, as discussed above. I don’t know anything about UNLV or UMKC, but you are an extremely strong candidate for Penn State. As for standing out, I don’t know what specific achievements or hooks you have (Are you all-state in soccer? Are you a refugee from Ukraine?) For starters, don’t be the student who belongs to six clubs, but has done nothing of note at any them. Instead, show commitment, advancement and leadership in whatever you do. As others have noted, if you are doing something you love this will come naturally.