I don't know why you gave me the Wikipedia link, but the other link has exactly what I just said. This is straight from what you (and previously I) linked to:
Six percent of early voting was done via a ballot drop box.
In any case, 18% wouldn't change anything I said. With that, I'm done doing silly analysis just to show that there is no point in us doing silly analysis.
We elected Biden on mostly anti-Trump sentiment then forgot and elected Trump again 4 years later. I think 20 years is more than enough time.