Debit / credit cards always show country where card is issued. By now you literally can't get card from a country you are not reside in. I guess there are few prepaid card exceptions, but they're generally rarely accepted anywhere. Banning those on e.g Stripe is super easy and a lot of SaaS do it.

I not saying it's impossible to bypass these checks, but you either have to be very tech-savvy person to do it right or you you even have to break the law.