It doesn't actually. The US can request data from whatever country US companies store it, and companies must comply.
So if you have strong requirements for data to stay in your country, using a US provider, whatever it is, is out of question no matter what the company's marketing claims (they are not maintaining these claims under oath for what it's worth: https://www.senat.fr/compte-rendu-commissions/20250609/ce_co... )