Yup, but the observers were allowed even before the judge ruled. They just didn't like the distance. Maybe that wouldn't be a problem if Donny hadn't tried to downplay the COVID-19 problem.
Still, the point of the meme is that Trump called for all voting to be stopped at 2:20 AM. Polls usually close around 6PM, so all of the votes have been cast. So far he's been claiming fraud up one side and down the other, but so far, the only fraud I've seen is his statements.