1. Voter fraud is "likely to be found" according to some authorities, but the Trump campaign, the US DOJ, and Republican legislatures seem to be focusing on election fraud. That is systematic fraud conducted by the State rather than individual voters.
This is literally what happened when Trump won against Clinton in 2016 despite losing the popular vote against her. Many people alleged fraud and even tried impeaching him, but nothing changed. Trump remained the President.
The same thing is repeating again now. No matter how much Trump and his supporters whine saying fraud, media bias etc, the result won't change. Biden is the 46th POTUS and that is a fact.