I live in a big city. But I've seen them at friend's houses in lots of places in the US. You can order one on Amazon for like $40 and install it in about 30 minutes.
This doesn't change the fact that bidets in the US are only in a vanishingly small percentage of homes. As an example, while not at all scientific, open up Zillow or Redfin and look at any random property and see if there's a bidet.
Yeah dude sorry but I agree with the other guy. You are living in a bubble if you think bidet adoption is high in the US.
There are clean and shiny bubbles, and there are dirty, stinking ones. They don't mix well, dirty always stains the shiny.