If states piled up the ballots in the order they arrived, that would mean later arriving votes would be counted before early arriving votes. Then if one party

If states piled up the ballots in the order they arrived, that would mean later arriving votes would be counted before early arriving votes. Then if one party had a propensity to vote by mail earlier than the other we'd see a pattern where the proportion from that party would increase over time. That's what we see. Can we verify this any other way? Not completely, but in Florida survey data shows that the Democrats had an early lead of 462,000 before early (non-mail) voting started and by election day that had decreased to ~100K[1] [1] https://thehill.com/homenews/campaign/524085-unprecedented-early-voting-gives-democrats-hope-while-republicans-count-on https://thehill.com/homenews/campaign/524085-unprecedented-e...