This narrative is intentional.
If there is reasonable doubts and suspicions about electoral votes, I'm pretty sure they can be given back to the state to be checked again before being certified.
They cannot be "thrown out" and the VP cannot "decide the winner".
You should be far more skeptical of this narrative rather than running with it. Harris can do anything that a VP can do, clearly. So if there is funny business suspected in the election she can have the state recheck their votes. The VP cannot "over turn" or "reject" or "decide the winner".
This is all another word game intended to twist and confuse for politcal benefit.