I have worked for global high tech manufacturing companies for most of my career. Most recently spending about a week in mainland China and Japan each month, then for several months in Europe and Mexico in contract manufacturers and logistics centers.
In general, Japan designs and manufactures excellent products of all kinds, China produces some of the finest products… think iPhones, complete junk, and everything in between. korea also produces some excellent products… think Aurender.
At the highest level, the best audio products come from the US, but with some outstanding products from Europe, Korea and Japan. I would say the US and Europe dominate. But, these are generalizations. When you drop down to lower tier stuff, it is all over the map.
Overall, country of origin is of little consequence when purchasing equipment.