As an aside, if you are wondering what the Orlanthi of the East Wilds in Ralios are like, the Griffin Mountain supplement is actually a good reference. The daily life of an Orlanthi hunter from distant Ralios differs little from that of a Balazaring hunter in his homeland.
The various hunter-gatherer clans there are gathered into about a dozen tribes under the erratic guidance of the Voshfrei dynasty.
Do they have bronze in the East Wilds? Yes, but mainly through the Voshfrei dynasty or through trade with Safelster.