Voter frand happens. The parties cannot control overzealous workers who find ways to cheat. I've run into a couple good stories where it's compelling tha some fraud happened in 2020.
But not to the extent of being able to overturn any state election. The accusers need to provide more evidence.
Mr. Trump and crew are using "facts" that just about any political operative knows about and twisting them.
And in 2020, Mr. Biden was a viable contender for the job--just like Mr. Trump was in 2016. There was no undemocratic process to vault an unpopular candidate to the high office.
I've also written a Medium article on this topic.