Would you say that an EU law restricting companies from complying with a US warrant is restricting the companies, or the US? (In practice the way this is done

Would you say that an EU law restricting companies from complying with a US warrant is restricting the companies, or the US? (In practice the way this is done is with data location rules, that EU data must be stored in the EU, which is clearly a restriction on the way the company operates)