It’s interesting that people are saying that this is so faithful, considering that they totally messed up the history of the California region. >!The series basically took place in NCR, but they just lazily disregarded the whole rebuilt NCR civilization and turned it into the east coast Bethesda wasteland. So what, did the NCR collapse back into wasteland in a decade or so too? Give me a break.!<
The series is canon within the Fallout continuity. Howard wanted an original story, instead of an adaptation of the games,[10] though the series discreetly continues game storylines and factions, such as the Brotherhood of Steel.
https://en.wikipedia.org/wiki/Fallout_(American_TV_series)
https://www.gamesradar.com/is-the-fallout-tv-show-canon-bethesda-games-todd-howard/