You must have "overlooked" the text of the law he breaking
Having read the law myself it is obvious that Newsom refusing to enforce a law is not a crime under the statute in question. Until the law in question requires city officials to enforce federal law and to become nothing more than appendages of the federal government Newsom isn't breaking any law by refusing to enforce non-city laws. This is the bedrock principle upon which our constitutional republic is founded. That each level of government is responsible for enforcing its own laws. The counties do not enforce city laws and the cities do not enforce county laws. You do not get on the highway and expect to be pulled over by a city police officer miles outside of his jurisdiction.