My guess is it was part of a two-pronged election strategy. First, make COVID denial part of the GOP's political platform, so that they're more likely to be performatively reckless, including waiting on line in crowded polling places where no one is masked (which goes further to scare people away that were actually taking COVID seriously), while people taking precautions like voting by mail or by voting early when it's less crowded would be disproportionately likely to vote Democratic.

Then, pass unreasonable regulations like "mail-in and early votes can't be counted until all votes cast on Election Day are counted", while pressuring election workers to post results as early as possible, skewing votes in their favor, or, failing that, point to the fact that the votes against them were counted later as evidence of fraud.