@junior2017 in dealing with your parents, broaden the discussion - not to include other schools (that comes later) but to include other factors such as location (any place outside the NE eliminates the Ivies), costs, size, majors or disciplines, even residential life, sports, and of course, acceptance rates. By doing this, you can bring in other schools. In other words, don’t attack or resist the Ivies. That won’t work.
Make sure they understand you need to apply to schools with a range of acceptance rates. Yes, Ivies and other single digit acceptance rate schools offer prestige great education, fantastic peer groups, etc. But you need a range, so suggest those schools you listed.
In fact, tell her you need to first search for a safety school. This is a school you are absolutely sure you will be accepted and your parents can afford and, this is important, you will be happy to attend. If you think “ABC is my safety but I hope I get into at least one other school because I don’t really want to go”, ABC is NOT a safety. Competitive students can be admitted to hundreds of colleges - that’s the easy part, it’s the “happy to attend” part that is difficult. So tell your parents, you need to focus on “lesser” schools for now to find that safety. It’s the hardest part of the search.
It’s important to bring college costs into the discussion. With your parents, run the NPC for every Ivy and school on your list (and more). This should be done no matter what school is on your list. Even if they have saved and/or have the income to afford full pay at an Ivy, it’s hard to hand over $70,000+/year (likely $80,000/year by the time you are a college senior) to any college. (This is where you can bring up the concept of merit aid)
All that said, your mom has shown she is open to visiting other schools. Keep suggesting schools to visit. Apply to a couple of Ivies and everyone should be content. good luck.