Treat it was a question of national interest. I don't have an answer, but it's not an idle question. The largest specialty bike shop in town, one that has been open for over 50 years, is closing next week. They sold every bike in the store and had been told it might be months before any could be delivered. They couldn't get replacement parts, either. Selling tires and tubes and fixing flats is the bread and butter of any bike shop.
I had a good reason to stop in the local big box store, so I went early yesterday, wearing an N-95 canister style mask, got in and got out. As I was headed back to auto parts, I passed what would be the bicycle area and took this picture.
This is a picture of a collapsed supply chain. It's still early, there's going to be more.
Basically all the worlds computer parts come from the same supply chain that runs from Korea, down through coastal China, over to Taiwan, and down to Malaysia.