I was curious about your question and googled. Here's the legislative history of the law: https://leginfo.legislature.ca.gov/faces/billTextClient.xhtm....

Reading the first analysis PDF:

> This bill, sponsored by the International Centre for Missing and Exploited Children and Children Now, seeks to require device and operating systems manufacturers to develop an age assurance signal that will be sent to application developers informing them of the age-bracket of the user who is downloading their application or entering their website. Depending on the age range of the user, a parent or guardian will have to consent prior to the user being allowed access to the platform. The bill presents a potentially elegant solution to a vexing problem underpinning many efforts to protect children online. However, there are several details to be worked out on the bill to ensure technical feasibility and that it strikes the appropriate balance between parental control and the autonomy of children, particularly older teens. The bill is supported by several parents’ organizations, including Parents for School Options, Protect our Kids, and Parents Support for Online Learning. In addition, the TransLatin Coalition and The Source LGBT+ Center are in support. The bill is opposed by Oakland Privacy, TechNet, and Chamber of Progress.