The data shows no such thing. If you examine same day only ballots then the data points to massive republican voter fraud. How is it possible, without ballot box stuffing and other fraudulent shenanigans in a state that is evenly divided, for Trump to have at least 1.1 million more same day votes than Biden? The only answer, based on your logic, is fraud. In reality, Biden had a 1.2 million vote lead before the polls opened on election day. Biden wasn't cutting into Trump's lead, Trump was reducing Biden's lead throughout election day. Biden's ballots were already in and waiting to be counted.
Compare it to a poker hand. Once the cards are shuffled and cut the best hand has been determined and will not change regardless of the order in which the cards are revealed. In Pennsylvania, Biden had the best hand.
Mark