Has a Copa America game ever ended 10-1?
It has. 10-1 has been a Copa America final 2 times in 1,738 games. The first was Brazil beat Bolivia on April 10, 1949; the latest was Brazil beat Bolivia on April 10, 1949.
That makes 10-1 the 26th most common final score out of 36 that have ever occurred in Copa America. One point away, 11-1 has happened never and 10-2 has happened never.