I’ll add that materials like tin and lapis lazuli were not the products of direct trade between the eastern Mediterranean and central Asia; they were passed along by a series of middlemen. For example, the Mycenaeans obtained amber from people in central Europe, who acquired it from the Baltic, ostrich feathers and eggshells from the Egyptians, who got them from Nubia, and so on. Tin would’ve been imported to Mesopotamia from states further east like Elam (in what is now Iran), which acquired it from the city-states of the Bactria-Margiana Archaeological Complex (awkwardly named, I know) in what is now Turkmenistan and parts of Uzbekistan, Tajikistan, and Afghanistan.

This is very different from the direct trade between regions via donkey caravans or ships — the Old Assyrian trade between Anatolia and the Assyrian city of Aššur, the 3rd/2nd millennium BCE trade between southern Mesopotamia and the Indus Valley Civilization, the trade expeditions between Egypt and the Horn of Africa, etc.