On the contrary; London Breed cut the SFPD budget by $120 million in 2020[1].
They are nearly 50% below "fully staffed" officer levels. Ask any SFPD officer about this, or call a station. They're generally happy to complain and tell you all about it.
[1] https://nypost.com/2021/12/15/behind-london-breeds-defund-th... and numerous other sources; Google it.