Do UC's care about non-recommended subject tests?

Colleges and Universities A-Z University of California - GENERAL
1

For example, if I am applying to a non-engineering major, will SAT Subject tests add anything to my candidacy?

2

Good scores can enhance your application even if they are not recommended but if they are recommended for your major, they will be important in your application review.

There are some SAT subject tests that are recommended for non-Engineering majors.

https://admission.universityofcalifornia.edu/admission-requirements/freshman-requirements/exam-requirement/sat-subject-tests.html