Trump is already trying to sue close states to stop them from counting votes, so there's evidence that there is some meddling going on.

But you're right - evidence is needed of messing with the actual votes, as opposed to just trying to interrupt the counting.

Edit: I'm saying the lawsuit is the meddling, not that there is meddling going on as part of the count.

Botnets that were active in the months leading up to the election but that suddenly shut down. Anyone looking at that?

If Trump or Biden had outside (foreign) help from anywhere it is likely , given the porous nature of our election security that some of the external structures needed to make it work have been dismantled since they are no longer useful.

Maybe security researchers could look at known botnets or intrusions for clues to whether compromised networks aided anyone.

In fairness, there's already clear evidence of attempts to subvert the election via manipulation of the USPS. It's not really an 'extraordinary' claim to suggest that Trump might attempt to manipulate the vote via other means - although I do agree that evidence is required to make the assertion.