You need to pursue ECs of interest. In most cases the what doesn’t matter but that you are passionate about them is a good thing. Sports, band, jobs in fast food or grocery stores don’t necessarily match up with majors (in many cases) or walking dogs, tutoring kids but so what.
Do things you care about whether they are tied to your intended major or not.
Do them for you - not for college apps. I hope you’re passionate about what you’ve done so far.
Btw many schools don’t care about ECs at all.