A .com domain is not exclusive to the United States
Unless you're implying that Verisign isn't a US company, just because .com has become the conventional domain for businesses worldwide doesn't change the fact that it's US-based. Similarly, the EU's widespread adoption of Microsoft Office doesn't make it any less American.
EDIT: That was unpopular. Why?
Source: own multiple, via EU registrar
(Edit: Parent was edited after reply - parent statement is now correct)
Verisign, the organisation that actually controls the .com top-level domain, is a US company and operates under US jurisdiction.
Where you purchase the domain from is irrelevant.
The initial thread read like “.com domains are exclusive to US” which they of course aren’t
And it goes deeper than just intent: .com was literally administered under a US government contract for decades, with Verisign only ending up in control because they acquired the company that held that government contract.
So while anyone can buy a .com today, the infrastructure and oversight have always been firmly American.