WHY DOESN'T UC COLLEGES SUPERSCORE

If UC colleges require that you submit all of your scores from all tests taken, then why don’t they superscore them? or do they?

I know that Cal Poly does superscores math and english, but do any other colleges such as Irvine superscore?

None of the UC’s superscore. They will take the highest score from a single sitting. All the Cal States will superscore and they only use the SAT Math/CR or ACT composite. Cal Poly SLO will also superscore between the SAT and ACT.

Thanks!