Can I send 1 ACT and 1 SAT to UC Colleges

I have done SAT with essay but my ACT is without writing.
My SAT score wasn’t good enough for me while my essay scored 21/24.
So is it possible to send 1 ACT test without writing and 1 SAT test with the essay to the UC colleges since I’ve heard that you can only send the highest score you’ve achieved in a test.

Thanks…

UC’s will only look at your test scores which include the essay so only your SAT score. They do not superscore at all and especially between 2 different test types.
You report your highest test score with essay from a single sitting but recommend you send all SAT or ACT scores with the essay/writing.