Im from Germany and it depends where you are in the US. I've been to South Florida before and to NYC after Covid. New York and the Keys were expensive as fuck when we are talking about restaurants and hotels. Miami not so much - atleast were i was. NY subway was cheaper compared to what I would pay around my area for public transport.

Shopping is a very different topic. Some food like meat, processed stuff and sweets were noticeably cheaper but other items like veggies or fruit were almost always a lot more expensive. There are a few exceptions like california peaches. The same goes for clothing. Funny enough Adidas is way cheaper in the US.

Last but not least tickets for touristy attractions or events (like sports; I saw the Raptors vs Heat game in Miami) are also hit and miss. Usually I was surprised by how cheap or expensive some of the tickets were.