IGN had an interview with Todd Howard and brought up the confusion and he said the events of New Vegas are canon and that Shady Sands was bombed after 2281. The sign outside Shady Sands in the series also refers to it as the first capital of the NCR, which would imply there's at least one other.
https://www.ign.com/articles/fallout-official-timeline-confirmed-how-the-show-fits-in-with-the-games