From what I understand, historically peat was harvested from certain types of wetlands as this is where it naturally occurs in large portions. But in the game it seems you can find large deposits of peat pretty much anywhere on the map. So what if there was a certain wetlands biome where you could exclusively find large areas of peat to harvest? In addition, you could use this area to find small portions of iron, which is also something that was historically done, through digging or maybe even sifting the ground.
This isn't really a suggestion or anything, just a thought that came to me while I was playing the other day, so I'm curious what other people might think about it. Would it be too much?