I’m no American but isn’t it a 4th Amendment issue, and the problem is how the various local, state, federal governments are using a private contractor (Flock) to do an end run around this by pretending that it’s no different from any private citizen recording another in a public space?
"Digital effects" have always been a grey area for unreasonable search-and-seizure. This was an infamous moment for the late Antonin Scalia, who, iirc, argued that the constistution couldn't reasonably be addressing this matter, as the Founding Fathers had no concept of digital effects when defining "documents and effects".
This has been allowed generally in US courts, to use private companies to collect data, etc.