Ever read THEY ALL DISCOVERED AMERICA published back around 1960?
Then there was a Reader’s Digest article back around 1970 in which they claimed the possibility of Phoenicians also discovering America.
Yeah, all that. But a Native American would say none of them “discovered” America for it wasn’t lost.
They were already here, having trekked great distance over land, or down the Pacific Coast if you like that version.
Living as I do along the Pacific Coast, and knowing the ancient age (11,000 years) and nature of archeological findings on the offshore Channel Islands, I think that is very plausible.
I have the book by Gloria Farley. It is fascinating. Indicates a number of different cultures briefly visiting the US from before Christ up to before Columbus. Left a number of different scripts and figures of gods and goddesses.