I don't understand why "vote harvesting" has to do with it. My understanding is that the delay is because of mail in voting. Because the votes were cast by mail

I don't understand why "vote harvesting" has to do with it. My understanding is that the delay is because of mail in voting. Because the votes were cast by mail, they arrive even after the election. The people who use mail in voting are the ones that due to work can't afford being in line for few hours, i.e. most of the working class.