Why doesn’t the Bible include all geographical locations?

Why does the content of the Bible primarily focus on the known world around the Mediterranean? If God created the entire Earth, why are other continents not mentioned? Does this suggest that God’s revelation was gradually unveiled according to humanity’s cognitive capacity at the time, rather than being fully revealed all at once? In this context, how should we understand the relationship between God’s omniscience and omnipotence and the specificity of His revelation?