Surveillance has a lot of use cases outside of government. Palantir could have sold its services to non-profits like the ACLU as a check on local, state, and law enforcement agencies.
In theory, yes. In practice no.
ALCU could not roll a system like that out; never mind securing the resources needed to deploy this meaningfully; using it would go against their ethos, because using it would make them authoritarian, or adjacent.
Similarly, even if HOAs could deploy a system like that, that'd make them authoritarian.
Mass surveillance products like these don't have a lot of non-authoritarian uses. Even if you could find such a use (of which I'm skeptical), it'd almost certainly need to be subsidized by an authoritarian customer. We're not talking about security cameras around you personal property, here.