Should I retake my SAT subject tests?

I’m planning on retaking both math II and bio m later this year. Will colleges frown upon this in any way? Assuming I get a higher score on those retakes, will colleges not regard those scores as highly (I mean, it’s a retake and I already knew what to expect from the test as well as some of the concepts from my first try)? If this helps I’m applying to the top tier UCs in Cali (i know the username says otherwise but I moved to CA freshman year. Still a Florida girl at heart though ;)). And I know they don’t require subject tests, but I want to make my stats as impressive as possible

If a school doesn’t require SAT subject tests, they aren’t looked upon as a major factor in admissions, and you do not have to send those scores if you don’t want to