“Most” students applying to this list of schools have NOT taken calculus BC as 10th graders. (I don’t have time to look up the numbers but it’s exceedingly rare.) They WILL commonly have taken Calculus BC as 11th or 12th graders but not all schools even offer it to 12th graders…let alone further math.
Taking Calculus 1 and 2 as dual enrollment and, if possible, MVC and Discrete Math as a senior would be plenty. See if your state’s flagship offers online courses you could take, or if there’s a community college nearby that offers classes beyond Calculus 1 (not all do).