Applying to Caltech - math

So I plan on applying to the Caltech class of 2024 and hope to indicate that math is not only my main passion and skill from high school, but also that it is my number-one choice for a major and career path.
My issue is that I have never participated in the AMC or any math competition.
Is this a dealbreaker? What should I do?

I don’t think this is a deal breaker as long as you have other activities that show your interest in math (such as math club, independent study, math research, etc.) combined with good grades in math and good scores on the sat/math subject test of course.