in pennsylvania, total turnout seems to have been marginally up, not down, but it was roughly flat. total votes increased by around 50,000. it would probably technically be record turnout, given that turnout in 2020 was high everywhere, but i can't find an article stating as much.
trump won by getting non-voters off the couch and he did that by creating an inspiring message of hope and change that resonated in key demographic groups.