Has an AFL game ever ended 26-22?
Exactly once. On August 7, 1909, St Kilda beat Geelong 26-22, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 26-22 in league history.
That makes 26-22 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 27-22 has happened never and 26-23 has happened never.