If the algo flips votes then it would just flip them within a stastically possible margin, but you have to run it over the entire night to keep up and prevent a large curve to overcome. (And ideally during early voting.) But it seems they could only run it once, and we saw the result of that on live TV when votes suddenly flipped from Trump to Biden on the news tickers. After that they had to use physical ballot stuffing, that’s when the wagons full of ballots were wheeled into poll counting centers like Detroit and and 100,000+ votes were all impossibly all for Biden.