Normally I don't do this but you're kind of scaremongering here whether you intended to or not so here: https://ariadneschulz.medium.com/what-happens-in-an-american-election-64cfc2a531fe
The big takeaway point is the procedural laws passed in 1948 or so. I get why you're concerned with Mike Pence overseeing the process, but if you take a look there's oversight from both Parties and both the Senate and the House. I game it out in my article above and I provide links to the relevant law.
I have no faith in either Mitch McConnell or Mike Pence, but the way I read all this, there are enough checks in place that their malfeasance will not be allowed to upset the tally.