That explains a_lot of things--like why down-ballot Republicans were all winning--but can you prove it?
There will be various forms of proof on different levels.
With these ballots they can tell if it was filled out with the same pen or by the same person.
See #81.
Several House candidates in Virginia were cheated late. They were in the larger city areas in the Richmond to Hampton roads corrider. All had substantial lead with 95% or more counted and all lost. The Dems have been taught across Virginia how to cheat. That explains why a solid Red state flipped to a blue state in one election. 2008 when Obama first ran. Of course the Virginia deep state GOP doesn’t say a word.
My theory is the tech companies didn’t care about down stream races. They wanted Trump out. They want open access to overseas technology experts and a world wide integrated tech system so the vote counting systems were designed to shaved Trump votes here and there and switched them to Biden. The system screwed up in Georgia and Minnesota. How do I know my theory is correct? I don’t! The other reason is Trump is unpopular with suburban women and some wool ejection st find him obnoxious .