I don't exactly see how a security guard licensed by the state actually being able to arrest a trespasser or vandalizer instead of having to call the city polic

I don't exactly see how a security guard licensed by the state actually being able to arrest a trespasser or vandalizer instead of having to call the city police to show up well after the crime to take pictures and write some notes makes anything a cyberpunk dystopia. They're not doing investigations. They aren't enforcing laws outside of what the state has made. They have far more liability concerns than regular police officers do because they aren't acting on behalf of the state. They don't have any sovereign immunity protections. Practically the only difference is they can do arrests on the spot and they can potentially still carry weapons in places where its normally prohibited when serving the duties as a peace officer. It is not like Google would have their own Google Police enforcing Google Law. And I imagine all the security guards at Google have also never used their weapons outside of a shooting range or hunting.