But that’s only seasonal, was my understanding.
Taiwan is the main source of good to great quality stuff, but there is bicycle manufacturing in lots of other places. Buy a bike at Walmart and it’s more likely to have come from mainland China. Or most “cheap” unicycles on eBay. Chinese manufacturers continue to get better, but I think they will be playing catch-up with Taiwan for a while longer (they make pretty good iPhones though). Millions of bikes are produced in India, I’m sure. Last I heard, Miyata still does all its manufacturing in Japan, though this priced them out of the US market back around 1993 or so. Many of you newer riders may not even know of the Miyata brand, but in the 80s, 90s and early 200s it was the go-to brand for Track and Freestyle.
In America (and I assume Canada, Western Europe, etc) there are many boutique manufacturers of bike frames and specialty components. Most of these, I think, are handmade, while some may be made in small production runs in semi-automated factories. Aside from the cost of doing business, those forms of manufacture are more expensive so usually what people are making is custom or very high-end stuff. Bronson Silva, of SilvaCycles, makes high-end touring frames and other bikes, but these are made to order. I think the same is true for most bike frame makers in the US.
And most of that is about frames. When it comes to most of the other parts, they are even less likely to come from “expensive” countries. Things like rims, tires, small parts, brakes and shifting mechanisms. Does Campagnolo still manufacture in France, Shimano still manufacture in Japan? These can probably be looked up (not that you need either for your unicycle).
In the 1970s you could get a Columbia unicycle, which had an American-made frame and seat (not sure about the other components). In the 80s you could still get an Emory unicycle, made by hand in Florida. And I think Schwinns were made in the USA up to 1983 or so (not 100% sure). I remember hearing once that the Schwinn Giraffe frames were made in France, but have no idea if this was true. Possibly the USA, possibly Taiwan. The Schwinns from 1986 and later were coming from Taiwan.