Just because it ain't provable does not mean it didn't happen. And most of the election fraud cases were thrown out due to a lack of jurisdiction (standing) rather than insufficient proof of wrongdoing. And it also goes to insufficient evidence of harm done rather than illegal activity.
That said, we oughta put this 2020 election fraud issue to bed. It's old news and at this point irrelevant. Is it still going on? I'd say so, yeah. And I have no doubt that whoever loses in November is going to ***** long and loud about election and voter fraud. It is a sad fact IMHO that too many people distrust our election system, justified or not. Therefore, we oughta be doing what we can to restore that lost trust while making sure every legal voter is not disenfranchised. It shouldn't be that hard to do, but unfortunately in today's toxic political climate it's damn near impossible.