Feel like Poland should be included since we're literally called "people of the fields" according to the etymology of Poland.

We also have some less intricate clothing (if it looks a bit Victorian to you - that’s pretty much the right era for most of this!)

Here is the Chilean huaso:

Gauchos, from primarily Argentina where they’re a large national symbol close to the level of cowboys in the US. Also gauchos are in Uruguay.  Their pants are called bombachas and the other garment wrapped around them are called chiripas.  They work in grasslands called pampas, known for being really fertile:

While they’re not as dressed up as the others or have as prominent of a culture, for a broader Latin American cowboy context, I feel like also adding llaneros, who are from Colombia and Venezuela, in the llanos region, a type of tropical grassland similar to the pampas, hence the name llanero. Pampas get annual flooding and these guys would go barefoot a lot, and you can see that the stirrup on the horse’s saddle is really different than what you’re probably used to seeing, to accommodate for that, which is what I want to point out as an aspect of plains cultures developing clothing/accessories/tools to suit the environment. 

Cowboy culture happened wherever Spanish colonial influence and grassland biomes came together.  They differ based on the grasslands having different climates (ex tropical in South America), and the local indigenous influence (ex, backtracking to gauchos, they would use this tool called bolas to catch animals, which were basically two balls tied to a string that you threw and it spun around an animals legs, and were an indigenous invention):