that said, typically the way it works (at least to my non-technical understanding) is that the hosting provider has to store all the raw data coming in and going out as a matter of law
Not in the United States, but my guess would be there are some back-room deals (or just government assets inside Amazon's organization) that make sure they get a realtime feed of all that data anyway.
I was like 85% sure you were wrong about the US not having a data retention law, but i checked and youre right. TIL