How are they not an 'agent of the state' and how does the 4th not apply? If the government asked for the scan/info on the vehicle, they are acting on behalf of the government?

https://www.fletc.gov/audio/definition-government-agent-unde...

Flock claims that "Fourth Amendment case law overwhelmingly shows that LPRs do not constitute a warrantless search because they take point-in-time photos of cars"

And that may be true, however Carpenter v. US established that long-term tracking of a person's location without a warrant is still not allowed under the Fourth Amendment.