I think that in the right hands, YA Westerns could do really well. The American West is an era that most people (even non-Americans) have a superficial familiarity with, more so than a lot of more obscure periods, so they can 'get' the visuals for a lot of it. And yet, there are a lot of specific bits that are pretty much untapped by fiction.
And, lives were as different from modern teenage life as a dystopia or a fantasy Middle-Ages kingdom. There were very few high-schools, there was a lot more work for everybody to do, and people had more responsibility at a younger age.
Teenage girls were school teachers. And wives and mothers. One woman writing in 'Western Horseman' magazine said that as a ranch wife 'I did everything a cowboy did, but in a skirt'. I don't imagine her children had a ton of 'free' time, either.
Less supervision, too, not that parents didn't want to, but - no phones!
Once you were out of earshot, you couldn't hear your mother calling you! On the other hand, that same communication factor makes some threats greater.
If you get trapped or captured, you can't just figure out how to get hold of your phone.
Y'know, sometimes people don't know what they want 'til they read it. Write it.
And as Hillcountryannie said "One of the women in my prose group commented how it was great to see young male characters doing physical work like hauling hay or building fences, because she'd been a teacher in a rural area and there were few characters the boys could relate to."
I don't imagine YA girls mind reading about young men hauling hay or building fences, muscles straining under their shirts... excuse me. Didn't mean to bring that up at all.
It would also be a chance to see young people of both sexes doing necessary work for the family's survival and success.