The Banjau, do they use nautical knot charts like ancient South Americans did? I say Bajau could have made it to the Americas. Many times, and were forgotten, with nothing in the way of relics, many times.

 

https://news.nationalgeographic.com/2018/04/bajau-sea-nomads-free-diving-spleen-science/?utm_source=reddit.com

https://www.straitstimes.com/singapore/sea-nomads-singapore-roots-go-back-centuries