I've always loved the idea of Weird West. I don't know if there is a widely accepted "definition" of Weird West but for me it's almost anything that breaks the Wild West tropes or setting in any fantastical/absurd way. All of this to say I would put this in the Weird West category in my own personal interpretation.
TLDR: In my personal opinion, any significant addition of scifi/fantasy/absurdist things to break the Wild West mold is Weird West. So yes, I see it as Weird West.
No, just a subverting of tropes isn't Weird West to me. As I said, it has to be significant. Something that implies much larger implications to the setting/world. Examples: steampunk tech, some alien/scifi tech, magic users, fantasy creatures, etc.
Even better for me is if it feels like a seamless addition. Like if everything about the town is a standard Wild West town but is also a low magic setting where some heirlooms have enchantments or a magic user is uncommon but not strange.