I have Biden winning by a lean margin in my prediction (so between 5-9 points), but Trump getting within 5 points would be a good performance for them. Youngkin's win was as a combination of him focusing on the bread & butter issues, Covid backlash, and distancing while not alienating Trump supporters. Obviously Trump is not taking this example and is unlikely to win back many of the Biden-Youngkin voters that made the governors victory possible.
Trump could do better with minorities than Youngkin though. I have Trump only losing by 4-5 points, with only the Richmond suburbs continuing to shift left.