i suppose to bridge the techno gap (the laser weapons, power armor, whatever) this could be a cyberpunk western game. holy shit, having said that, why isn't there games like that.
This has bugged me too,enough to actually look into it, and I think I have a partial explanation.
Before I start, in fairness there are cyberpunk Western pnpRPGs like Deadlands: Wasted West and Firefly, so none of this should be taken as a reason cyberpunk Western games can't happen, just reasons why they are hard.
First, of course, the Wild West never actually existed; it's a product of "Wild West Shows" and spaghetti Westerns. If you want to ask what the Wild West would look like if everyone had laser guns, it must be pointed out that what the West looked like with revolvers was not wild; the reality was more of an organized westward expansion aided by military genocide and federal land grants. Cowboys just moved cows around. So trying to make an alternate Wild West just compounds the problem of trying to provide a plausible explanation for a theme park version of history made by people who never saw the original.
Even if you can get around that, the myth of the West is rooted in the technology of the time. Cyberpunk deals with our anxieties at being, if anything, too connected to the rest of the world; the Western is a study of what people do when isolated. Those don't necessarily mesh cleanly. You don't need circuit judges and posses when you have cell phones and cars, and the real-life cowboys stopped being a thing when refrigerated cattle cars became sufficiently available and killed the cattle drive. The very concept of a frontier gets vastly more complicated in an age of worldwide, portable lightspeed communication.
In short, there aren't cyberpunk Westerns because it's really difficult to make a believable Western, and trying an alt-history Western just makes that even more obvious.