You can in fact craft Pokeballs in this game. In the stream when they were talking about crafting at the camp, you can see Pokeball is one of the craftable items.

I love how hard they're trying to make things looks fit for their time, but that tent...it's straight OOPARTS compared to other things in the time period.

Can't wait to see how the PokeCenters in this time period would look like without the machines. Will they have 'treatment time' mechanic so you can't use your Pokemon when they're being healed?