That was from 2000 to 2010. There has been another 8 to 9 percent growth since then. Add that in to the factors I already mentioned. Also consider that many people who came to the state in the 80s and 90s probably weren't yet citizens and their children are. I'm not saying there wasn't cheating, but Biden most likely won the state even without the fraud.
VA. 2000 7m
VA. 2020 8.6m