According to the Pathfinder wiki, these are all of the exports of every nation on Avistan that actually has an economy (sorry Mendev):
Absalom
Imported goods, lumber, iron, shellfish and sky-metals.
Andoran
Mined/harvested raw materials, lumber, ore, etc, banking, and imported artifacts from Osirion, the Mwangi Expanse, Azlant, and Arcadia.
Brevoy
Copper, fur, fish and shellfish, grain, iron, salt, and timber, also imports and resells multiple good types.
Cheliax
Wines, olive oils, artworks, luxury goods, slaves, and imported goods.
Druma
Mined goods, alpaca wool, imported goods
Five Kings Mountains
metalwork, gemstones, other “crafted items”, imported goods
Hermea
Expertly crafted goods and knowledge.
Isger
lumber, food, and ore.
Kyonin
Arts and “finished goods”
Lands of the Linnorm Kings
They import mot of their food, what (if anything ) they export isn’t stated, but implied to be hunting goods (furs, tusks, etc.)
Molthune
Imported trade goods
Nidal
silver jewelry, glasswork, and other exquisite luxuries.
Numeria
Sky Metals, technological artifacts, hunting trophies.
Qadira
Mostly Imported goods, some natively mined goods.
Razmiran
Food, cloth, lumber, and fine woodwork
River Kingdoms
Whatever we made them in “Kingmaker”.
Ravounel
Fish, marble, lumber, salt, silver, and other natural resources.