You’re right.
In my state of NC, we had the election for Governor two years ago in which the black neighborhoods of Durham, NC, were kept open way past time to stop the voting...just so there were enough votes to give the governorship to the Democrat Roy Cooper.
So, NC has the same fraudsaters as other states.....it’s everywhere.
Keeping open isn’t the ‘thing’ - that can be done for real reasons that are valid. The ‘tell’ is when ballot boxes are held back for hours after most State precincts have handed theirs in... And traditionally it’s only done with close races...