Most of the modern-day scholars deny the idea that Phoenicians, Canaanites, or Carthaginians discovered the Americas first.I would say all modern scholars reject this idea. I know of no remaining exceptions.
Ronald H. Fritze, an American historian, says that although it was technically possible for those people to reach the Americas, it probably never happened:
“No archaeological evidence has yet been discovered to prove the contentions of Irwin, Gordon, Bailey, Fell and others. Since even the fleeting Norse presence in Vinland left definite archaeological remains at L’Anse aux Meadows in Newfoundland, it seems logical that the allegedly more extensive Phoenician and Carthaginian presence would have left similar evidence. The absence of such remains is strong circumstantial evidence that the Phoenicians and Carthaginians never reached the Americas.”
Until some concrete evidence appears, this theory will remain only a fantasy.
I have covered these issues in greater detail here and links. Cross-file under New World Forgery Watch.