Has an AFL game ever ended 93-21?
Exactly once. On August 20, 1904, Melbourne beat St Kilda 93-21, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 93-21 in league history.
That makes 93-21 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 94-21 has happened never and 93-22 has happened never.