Has a FIBA World Cup game ever ended 77-72?
Exactly once. On August 9, 2021, Belarus beat Romania 77-72, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 77-72 in league history.
That makes 77-72 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 78-72 has happened 2 times and 77-73 has happened 8 times.