You are correct. There is no legal process to reverse this; even if the supreme court finds fraud, there is no remedy under current law. That doesn't mean it can't happen, it just means that we're in uncharted territory which we already knew.

(My theory is devolution, which is discussed pretty fully in older posts (circa early January) and a few recent ones, in which the military already concluded the Biden administration would be illegitimate before it began, and plotted an alternate course of simply ignoring it and planning their activities based on law of war manual.)