The Corpo section is probably the shiny pristine bit.

We've mostly seen the outskirts of it as well as Pacifica.

Basically out of the different districts of Night City, the innermost downtown areas where the Corporations and rich reside will be the most "Cyberpunk" in terms of appearance, with tall buildings and shiny chrome.

The outskirts and less well-off areas will be poor people trying to get by and gangs who basically rule the streets as the police don't care about the poor areas as the Corporations own them.

It wasn't all designed like that from the get-go. Lore wise, the poorest area we've seen, Pacifica, was originally designed to be some kind of big shopping center, but the investors pulled out at the last second, and the projects and constructions were all abandoned. The police don't even go there, and the gangs like the Voodoo Boys basically act as the Law around there.