In my tiny little brain there is only one relevant question to be answered about the 2020 election, and it tees up the events of 1/6/21. The question is, Who would have won the 2020 election if the voting rules of 2016 had been followed? No mail-in ballots (as distinguished from Absentee Ballots), no ballot boxes, no Election Season,, and no massive ballot harvesting.
And the answer, like it or not, is Donald J. Trump. Which is why there were tens of thousands of justifiably pissed off Trump supporters in Washington on January 6th. Just as there would have been even more pissed off people there if Trump had won under the same circumstances. Of course that is an impossible hypothetical because Republicans don't cheat.