There are some people who possibly explored the Americas before Leif Erikson and Columbus. These include:

Saint Brendan, an Irish monk who may have sailed across the Atlantic Ocean in the 6th century1.
Abu Bakr II, a Malian king who allegedly led a fleet of 200 ships to explore the Atlantic Ocean in 13111.
Henry I Sinclair, a Scottish nobleman who may have explored Greenland and North America in the late 1300s1.
Zheng He, a Chinese admiral who possibly discovered the Americas in 1421 during his seventh voyage1.
However, these claims are not widely accepted by historians and lack conclusive evidence. Leif Erikson is still considered the first European to reach the North American continent
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