As noted above some Ivy schools have you applying directly to a program (ex. business, engineering etc.) and others you don’t. Admission officers fully understand that students are free to change majors once they are admitted to the college (at least within the program they have been admitted to if that is applicable). Admission officers are wise to the game of people applying with one major and then switching to another so the intended major generally does not play much of a role in admissions decisions (there could be exceptions if an applicant has a long-standing demonstrated interest in an esoteric field or something like that, but I’d say that is the exception not the rule).