Details matter. The California law and the others that seem to be modeled after it involves no actual age verification and no presentation of any identifying documents to anyone. It just requires that devices include a system that lets parents when setting up a child's device specify an age range and requires that things that need to check age use the range the parent specified.
This is the general approach that privacy advocates have said should be taken. It is just what I'd expect from a liberal state that has a record of trying to protect privacy but wants to address the issue of how to keep children from sites that are not suitable.