I’m pretty sure all absentee ballots are counted. I know they are in Iowa.
True for Iowa.
All absentee ballots that are received on time are considered for counting. Absentee ballots received by Election Day are counted on Election Day. Ballots received after Election Day but before the deadline are counted when the absentee and special voters' precinct board meets as long as they are postmarked the day before Election Day or earlier. - sos@sos.iowa.gov
But not everywhere.