Good evening, kirstie3.
Thanks for taking the time to reach out to the Community for support. I'd be happy to provide some information regarding QuickBooks Payments.
At this time, the option to accept credit cards in foreign currency isn't available in QuickBooks Online. I can see how being able to accepts credit card outside of Canada would be beneficial for you, so I recommend leaving feedback for our developers. Comments are viewed and considered as they create new features and updates for the software.
If you have any other questions, feel free to reach back out here.