What you have highlighted is that there was a statistical outlier in terms of the number of votes cast in the 2020 election. Both Biden and Trump received more votes than any other candidate in history. What is not answered is why? Was there such great enthusiasm for Biden, an elderly white guy who hardly campaigned, that he received tens of millions more votes than Reagan, FDR, JFK, Obama, Clinton or any other candidate in history? That doesn't seem to add up. What happened is that the political establishment changed the voting laws in the months leading up to the election and those changes affected the outcome in a significant way. The vast majority of the votes cast using the alternative methods went to Biden whereas the votes for Trump were cast at the polls. Trump overstates that as "stealing" the election but those changes certainly altered the outcome. If the reverse had occurred, and Trump had won the election based on significant changes made in the election laws in the months preceding the election, the Dems would have revolted and the media would gone on an endless campaign to suggest that Trump's election was not legitimate. Always hypocrisy.
I did answer "Why such a high percentage turnout?". The highest percentage since 1900. The great expansion of allowing mail-in ballots.
"Why the expansion of mail-in ballots?". Because of COVID-19. Going with in person ballots would have exposed more people to COVID-19, just a few months before COVID-19 vaccines first became available. There are thousands of people walking around today, and I might be one of them, who would be dead, if the mail-in ballot option was not available.
"Why did Biden get so many more mail-in ballots then Trump?" Because Biden encourage voters to choose the mail-in ballot option. While Trump told voters to go vote in person. So, naturally, Biden got a lot higher percentage of mail-in ballots.
"Why did Trump attract so many enthusiastic people to show up at his rallies? While Biden attracted so few, indeed, exactly zero?". Because Trump, as was the usual case for both Republican and Democratic Presidential candidates, organized large rallies to show their support for Trump. While, at the same time, Biden did not organized large rallies for himself, indeed, strongly advised people not to come together in large groups for any reason, including showing support for himself. Limiting the spread of COVID-19 was more important than getting a few more votes. No doubt Biden cost himself some votes, suppressed voter enthusiasm for himself, as large rallies have always generated for every candidate for over the last 100 years. But it was the right call.
This is my favorite decision Biden has ever made.Note, Biden was consistent. He choose not to allow large rallies for himself. Because this decision helped limit the spread of COVID-19. This decision also caused Biden to lose votes. Biden also encouraged voters to choose to vote using mail-in ballots. Because this decision helped limit the spread of COVID-19. This decision gained Biden votes. Biden always chose the option to limit the spread of COVID-19, whether it would gain or lose him votes. These decisions were correct.
Just as CTers pretend that certain question have never been answered, "How could the SBT be true? What could possibly have caused JFK's head to go backwards? Why don't LNers ever address these questions?" you try the same gambit and imply that these questions have never been answered. These questions about the 2020 election have been addressed.
The results of the Election of 2000 was altered because of changes in the Election rules implemented in the months leading up to the election. Florida changed the procedures (without any action taken by the Florida State Legislature) to allow an increase to a dozen Presidential candidates. This required changes in the ballots, which either involved using small print, multiple pages for the Presidential election, or butterfly ballots. This resulted in the invalidation of thousands of ballots, due to voter error, which proportionaly cost the Democrats . The Democrats complained a lot about this and took their case to the courts. And lose, which was the correct rulings. But Democrats certainly did not revolt, like storm the Capitol. They complained, but accepted the vote in the end. Gore announced that Bush had won the election and everyone should accept this. Which was the right thing to do. Stuff happens that can swing close elections. That caused the Democrats to lose in 2000, and the Republicans to lose in 2020.
* * * * *
On a separate note, Trump's handling of COVID-19 did not lose him the election. A far greater issue, was Trump telling his supporters not to use mail-in ballots but to vote in person. This cost him millions of votes. Because, on election night, many people intending to vote for Trump decided that they were too tired. Just wanted to go home, get some dinner and go to bed. Or came down with a cold. Or had to take care of a sick child. Or had issues with their automobile. Or had to work late. Or some other issue came up that always costs millions of votes in each Presidential election. Trump would still have lost the popular vote. But just as in 2016, he would have just squeeked by in 2020 in the Electoral College.
Why did Trump do such a bone-headed decision of discouraging mail-in ballots? I am not a mind reader, but I think it was because Trump preferred to win with cleverness, and not to just get an honest win. He thought he would limit his voters from using mail-in ballots. Then, after the election, get the courts to throw out mail-in ballots. He thought he could get the Supreme Court to back this scheme 6-3, with three of the members appointed by him. This scheme did not work out too well. And cost him the election. Sometimes people can be too clever for their own good.