> Most modern scholars believe he was most likely born sometime around 480 BC or thereabouts in Śākya Gaṇarājya, an oligarchic state in the northern Indian subcontinent and he most likely died sometime around 400 BC or thereabouts.
Siddhartha Gautama was born in present day Nepal, in the city of Kapilvastu in the Lumbini region. There are archaeological remains of the palace where he was born along with scriptures explicitly matching the origins and design.
The article also goes to great lengths to emphasize a lot of details are nebulous, however they are documented well since the Buddha was a royal prince. For that reason not sure where the idea that the depiction of Chinese Buddha should be accurate is insinuated either.