Wow! Are you suggesting that clay can be found in each of these countries?

Mind blown!

A for effort but keep trying bucko!

All the animals depicted had at least 1 eye?

Patterns bruh, in front of & surrounding the animals

Nah, that's not it. What about very similar spectral analysis of the brown dyes used in the pottery?

That too Lulz

And similarly shaped vessels

I could see that point if they were all an unusual shape like a duodecahedron, but since they all mimic natural gourd shapes,not so much.

not so much on its own. my work requires understanding the combined weight of multiple similarities. it's not for everyone.