This article by Paul Wallin in Nature, July 2020, explains a recent paper by Ioannidis et al.
Their genetic study makes the case that South Americans did sail to the Marquesas Islands in the late 12th century, where they encountered Polynesian people.
The authors made the notable discovery that an initial admixture event between Native South Americans and ...
The most obvious evidence of contact, curiously enough, is not mentioned here. There's a friggin' Inca imperial wall in Easter Island. There's Andean DNA in the Polynesian bloodline but not vice-versa.