We have over 900 special tax districts in my state that raise the tax rate above the normal. Across the street from the
Walmart near me is 1% higher sales tax district for most of the buildings there to help subsidize the developer (so the rate is technically 10.475%). But even without special tax districts it varies all over between the cities and counties within my metro.
Sales tax changes too depending on what they want to use the money from it for. In April our city had on a special ballot a renewal of the Street Maintenance Sales Tax (3/8ths of a cent) and the Parks Sales Tax (1/8ths of a cent). This was because it was going to sunset in 2024 and 2025 respectively.
Granted sales tax doesn't change quite as frequently (usually because voters vote on it) but I think many of in the U.S. are just used to differences in tax rates depending on where we are at.
I could encounter so many different taxing rates in my metro. I bought some shoes up north last weekend but located on the other side of the state line and the rate was 8.85% whereas my city is 9.475%. The nearest Costco to me (located in the city next to me) is 9.35% but go just down the street to the mall and it's 10.1% IIRC. Go to the Walmart located just a few miles away from me but in a different city and the rate is 9.6%. Go to another shopping center in a different city and the rate is 9.1%. All of these are in relativity close to me (all but the one across state lines are under 15 miles from my house).
And in my state just as of January this year we have a lower tax rate on groceries but with a lot of exemptions.
It's gotta be so confusing to international visitors.