Germany has a strong preference with its local brands. It is still easier to find local repair shops that handle BSH and Miele machines than cheaper Asian brands.
You do pay premium for the quality. It is worth it though. My parents' Siemens Washer-Dryer combo is still strong after 15 years. A couple parts needed to be changed last year but after the replacement the machine works very well now.
Don't know about the US. From what I can tell Samsung and LG appliances are certainly less common in Europe than the European brands (there's also cheaper brands like Beko or Gorenje).
On Miele, they sure seem to make a sizeable effort to keep as much as they can in Germany, including the motors, electronics etc.
They seem to expand vacuum cleaner factories in China as well, but it could be the best of both world with a company dedicated to push the local ecosystem as much as they can, and go beyond when absolutely needed.
Miele (at a more premium price point) production is even more concentrated in Germany. https://m.miele.com/en/com/production-sites-2157.htm
(Edit: No replies after 8 hours, but of course they then came in quickly after Europe woke up..)