You are right that operating system is not defined. But the definition of operating system provider is this: “(g) “Operating system provider” means a person or entity that develops, licenses, or controls the operating system software on a computer, mobile device, or any other general purpose computing device.” (emphasis mine)
You are right that operating system is not defined. But the definition of operating system provider is this: “(g) “Operating system provider” means a person or entity that develops, licenses, or controls the operating system software on a computer, mobile device, or any other general purpose computing device.” (emphasis mine)
Which should clearly exclude embedded devices.
https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202520260AB1043