Has a FIBA World Cup game ever ended 81-59?
Exactly once. On February 25, 2022, Panama beat Paraguay 81-59, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 81-59 in league history.
That makes 81-59 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 82-59 has happened 1 times and 81-60 has happened 1 times.