There have been 81 lawsuits filed that are related to the 2020 election, and more being filed all the time.
There have been thousands of witnesses, swearing under oath, that they personally witnessed election fraud.
About half the cases are either pending or were dismissed due to judge making an arbitrary claim without any evidence presented.
Of the cases (47) where evidence has been presented, Trump and/or Republican plaintiff has won the majority.
Big cases still pending in key states, and evidence is scheduled to be presented.
http://wiseenergy.org/Energy/Election/2020_Election_Lawsuits.pdf
http://wiseenergy.org/Energy/Election/2020_Election_Cases.htm
Of those 15 cases Trump won, only 1 of those actually occurred after the election. Also none of those case related to election fraud, only various procedure questions regarding mail in ballots etc.
Feel free to look it up yourself.