Can Amazon Seller ship item from overseas without FBA on US Amazon website?

I just purchased item on Amazon from third party seller.., then realized the item will be shipped directly from China and estimated arrival time 30 days.

Anyone knows if this is a legal sale on US Amazon site? TBH i don’t feel like sharing my personal info with someone overseas, now they got my name full name, e-mail and address. I also got few random fishing emails after order been placed, I never had even one in the last year or so. Can be coincident but don’t think so…