No, but maybe yes?
You can only use the app in the country you're registered in, I think it's some legal things with Visa/Mastercard and PCI compliance.
However, you can accept payments from international cards via a checkout link. I created a variable checkout link so the customer can enter the amount (so pay.400degrees.co.uk takes you there if you want to see what it looks like).
This should work fine - although I'm not sure if it opens you to a higher risk of chargebacks being international.
