There is the Food & Drug Administration (FDA) and normally that’s their purview, but they’re probably a bit more lax and industry-friendly, so more likely to let that stuff slide. California is a bit more progressive and health-conscious, and they’re a big enough market that when they say they’re gonna ban something, it essentially becomes banned for everybody else. Businesses won’t develop CA and non-CA products, they’ll just rework whatever it is to conform with CA’s demands.
The FDA did step in I believe when states starting talking about introducing different labeling standards and having different requirements for what needed to be called out, because it would’ve turned into a nightmare if you had to manage 50 different sets of labeling requirements.