On a per capita basis yes, but the US has done more tests than any other country. Once the US doubles testing capacity again it will be on par with other large countries.
I am hoping for the best for the US, but I am quite offended by how the US is scrambling to undo its own mistakes by steamrolling everybody else.
The US dropped many balls and started late with ramping testing in particular, but now the ramping is happening and just takes time. There was also no way the US could test enough people using the original set of tests that simply took too long. New technology had to be developed.
A large country has a lot of people to test, but also a lot of people to manufacture and perform the tests. So that argument doesn't work for me. Especially when we're talking about the richest country in the world.
Now, if the test making and executing is done by a single centralized organization, it does make some sense. Which is why that way of doing things is an anti-pattern.