Wayne County (Detroit) absentee ballots (and lesser numbers in other urban counties), which numbered in the hundreds of thousands didn’t start getting counted until after all other votes counted. Wayne County is 65-70% democrat, and the mail-in ballots skewed even stronger due to pandemic and dems being far more likely to vote this way. So when Trump was leading the state by 200k, Wayne County had only counted ~50% of the votes there, leaving 500k plus votes to go, which went at a huge margin for the dems.
Not really surprising at all. Of course in Trump universe they gonna try to act like it is lol