He will have to start engaging over the next month, even if in the same manner that many Americans remotely engage each other daily via work, school, etc.
Voters need to know that Biden is ready and willing to command, and represents the better and safer option going forward for the American people.
If voters have that confidence, Biden will win.
If voters lack that confidence, then it will be a jump ball in November ... as the disdain for Trump is still paramount.