Provisional votes aren’t found, they have been there all along and everyone knew where they were and how many at each precinct. If you show up at the polls to vote and your name is not on the voter rolls for that precinct, they give you a ballot, but it is sealed in an envelope, it is not counted on election day. If a contest is close, they determine if the voter is duly registered and if so, they open the provisional ballots and count it. This usually happens when someone has moved and failed to inform the Court House, so there name was on their old precinct roll.
That is true but votes are often found as I described as well. Example Broward county Fla. I was not commenting specifically about Kansas.