Uncured bacon doesn't exist. It's a lie. Uncured bacon is cured with celery nitrates and nitrites instead of synthetic nitrates and nitrites. It is all cured bacon.
And that's fine. If people want a more naturally cured bacon that tastes worse and has zero health benefits, and costs more, calling it "uncured" is still deceptive. It's also crowding out the actual bacon market on the low end.
Yes, American grocery stores sell a product called "uncured bacon." It's bacon cured with celery juice, which is a natural source of nitrates. You can also buy pork belly if you have the right butcher.
Sometimes my grocery store also has it, but in a specialty meats section. I didn't want to presume that every store would. I've heard good things about Costco but I don't live near enough to one to justify a membership.
I believe the bacon cured with celery nitrates actually has more nitrates than regular bacon as well, because it's not regulated like using regular nitrates.
So it's much worse for you than just eating normally cured bacon.