Eh, I made A TL about this before. I realized that it was likely to lead too both the Americans and Europeans wiping each other out when they reach each other, because the Poltnesians would have pigs and chickens. New Diseases would develope relatvely quickly.
I should warn you it's really unfinished. Only two updates. https://www.alternatehistory.com/discussion/showthread.php?t=61781&highlight=Polynesians+AmericaAtom, is there a link to this TL? Because it would be interesting to read it, even if it's unfinished...
Yes Atom, you are the master!