UCSD does not publish the waitlist information for this year until the waitlist is closed. When they start admitting off the waitlist will depend upon how many accepted students enroll by May 1. How many and how long the waitlist remains open, again depends upon how many spots are avaialble. Last year, some of the UC waitlist did not close until July.
Previous waitlist information is available here: **UCSD Class of 2025 Waitlist Discussion**