Vogue article covers the Getty this past weekend and states Gavin Newsom DID attend. That doesn't mean the author saw him, though, just that he was reportedly in attendance.
“But despite the architectural magnificence—and the panoply of state, with Nancy Pelosi officiating and Governor Newsom and Mayor Breed in attendance—the ceremony managed to feel extraordinarily intimate and personal,
https://www.vogue.com/slideshow/inside-ivy-getty-wedding-weekend-in-san-francisco
Remember the chart that shows the power families in San Francisco - Pelosi, Newsom, Getty - and how intertwined they are and have been for generations?