UCLA use to have a comment on their Freshman selection page that AP scores were considered in the admission process but that statement is no longer there. That said, the general wisdom when reporting AP scores to competitive schools is report 4’s and 5’s even though UCLA gives credit for AP scores of 3 or higher.
There is no requirement to report any AP scores but recently some UC campuses have stated that they use AP scores to give context to the grades received in the AP classes.