It doesn’t have to, but it’s based on the Cyberpunk tabletop rpg which is mostly centered around Night City. So most of the existing lore is focused on America. Personally I’d prefer more games/movies/… outside the US in general, I’ve seen enough fictional versions of NYC and LA.
The successor to Deus Ex is Deus Ex. Mankind Divided was released in 2016, so it’s roughly as old as the other games you listed as successors to the other IPs.