However things like cars, phones, vacations, gas/petrol or electricity still cost the same everywhere…
Vacations maybe because that also depends on where you want to go. Cars can differ wildly, unless you want a sportscar or some such. Same goes for phones, often you get one „free“ with your contract for mobile. Gas/Petrol vary a lot, because of taxes and other state side things attached to them. Same goes for electricity plus those also depend on availability.
A VW Golf or a Hyundai i20 costs the same in London as in a village, not only a Porsche.
Same for the phone, the contract per month is the same anywhere you live.
Taxes on gas usually are the same for all locations in a country, at least in the countries I’ve lived in. Only highway/town variations.
I’d love to see where electricity prices vary locally, never seen that myself.