The remaining Mayans in Mexico (and some other Native Americans) have a distinguishing birth mark on their lower back—a purplish spot—called the Mongolian spot which is also found on certain peoples in Mongolia and Polynesia.
People have crossed the Pacific ocean to South America on boats they built a long time ago. Hawaii didn’t just sit there uninhabited. It was a place to eat as much citrus as possible. Then collect water. Fishing must have been easy in those times. Then they got on the counter-clockwise ocean current that got them to SA.