Hey @rlwoufc. Unfortunately there isn't a way to change the region of your phone and you may be unable to download certain software updates and apps such as Samsung Pay won't work.
I imported a Samsung Note ²⁰ Ultra from Hong Kong to the UK.
I used Google Pay instead of Samsung Pay / Samsung Wallet.
Although some did say Samsung Pay worked but I didn't use it anyway so can't confirm either way.
Software and security updates downloaded fine.
Unfortunately Samsung UK won't provide warranty support to an imported phone.
My Samsung Members App benefits section was blank due to the different region.
I have come across posts where sometimes a phone from the US may not be fully compatible with the bands and frequencies the UK Network's use which is why I personally chose one from Hong Kong.
Although I don't use 5G some mentioned issues getting that to work.
Hope that helps @rlwoufc
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help.