Cyberpunk 2077 is based on the pen an paper RPG that only covers 2013-2045 in any sort of depth, with most of the lore being oriented towards edgy angsty worldbuilding rather than focusing on pre-existing characters that relatively few players will get involved with in the course of their games.

There are apparently some Cyberpunk 2020 based novels, but they're terrible from what I've heard, the real Cyberpunk novels would be the works of authors like William Gibson.