Just looked over the UC application guide for this year and there is no indication that you can rank the UC campuses. The only ranking are the Residential colleges at UCSD as mentioned by @tamagotchi.
What is interesting is on the Common Data set for UCI, an applicant’s level of interest is not considered which is true for all the UC’s.
https://datahub.oapir.uci.edu/files/campus/CDS2021_22.pdf