Nick here from Shopify.
Just to confirm, are you referring to the standard credit card rates through Shopify Payments from the pricing and plans page as seen below?
This is is the same rate as the United States, but higher than other countries like the UK and smaller than other countries such as Hong Kong where it's 3.3%
All of the different country rates can be compared by checking the different regions pricing pages and the rate of a certain country depends on the region it is in.
All the best, Nick