Has a World Cup game ever ended 7-2?
Yes. World Cup has seen a final score of 7-2 7 times. It first happened on June 20, 1937, when Sweden beat Estonia, and most recently on November 15, 2021, when Niger beat Djibouti.
That makes 7-2 the 30th most common final score out of 53 that have ever occurred in World Cup. One point away, 8-2 has happened 2 times and 7-3 has happened 2 times. At one point the score disappeared for 36 years, between 1965 and 2001.