Also, "my data is handled by a company under the EU law" is quite a good sale pitch these days.
Everyone operating in the EU is under EU law, including Amazon, so it's certainly not a competitive pitch vs. Amazon, however much it might be on a checklist of things customers are looking for.
I'm not saying it's enough to build an AWS-sized business or that Lidl is in a position to do it but there are cloud hosts who sell themselves specifically on that, such Exoscale.com
Also, it's a matter of culture, the native law context of a company drives a lot of the things they do internally.
Why?
Otherwise, I don't think any of Germans or Poles or Chinese or Americans etc are better humans than the other. Or more deserving.
There's a bit of an argument in favour of buying from poorer countries, like China or Bangladesh, I guess.
Though if you actually want to support America, I'd suggest you buy from the foreigner that's most likely to hoard and never spend your USD: that would mean America would get to consume some goods and services in return for ink and paper (or these days, 0s and 1s.)
The Fed targets inflation. A dollar hoarded might as well be burned. So they'll just replace it with a fresh new dollar.
(And if the foreigners eventually spend the dollar and it comes back to the economy you know and love, that's not much different than if you had spend the dollar directly in America in the first place. America just got an interest free loan of some goods and services while the dollar was abroad.
If enough dollars flow back to impact inflation, the Fed will shrink their balance sheet to accommodate. Ie they'll sell government bonds from their inventory to soak up excess dollars.)
The situation is slightly different, if you eg want to support your very local economy, eg your brother-in-law's company, or your city, your county or your state. Because the Fed target inflation in the whole country, not in one specific location.
But really, just buy from the vendor that has the best balance of quality and price, I guess.
There are absolutely companies who won't use Amazon due to concerns over things like that.
When I worked with a European cloud host, customers in Germany demanded German data centres and EU ownership. I've seen enough people/companies ask for that to convince me there's at least some demand.
What's your reason for saying it's not a good differentiator?