To confirm, are you seeing other countries show up within the dropdown Country/Region selection on your store's checkout, as shown below?
If this is the case, you can navigate to Settings > Markets on your Shopify admin to check if your store's markets have other regions activated outside of the US and Europe. As an example, you may see an international market on your store's Markets settings, as seen below. You can click Manage to get more information about the specific market, and to check whether or not it's an active market on your store.
From there, you can then click on Deactivate market or Remove market to prevent customers from the market's region from checking out on your store. If you choose to deactivate the market, your market settings will be saved by the system and it'll then allow you to easily reactivate it in the future. Choosing to remove the market will, however, completely delete the market from your store's Markets settings. You can find more information about this on our help guide here.
If you're not too familiar with our Shopify Markets feature, feel free to go through our introductory guide here to learn more about it. We've recently rolled out Shopify Markets to the majority of merchants on our platform to help set up and manage cross-border selling. As you're currently selling to a couple of different regions on your store, I've curated some more resources below in case you'd like to take a look at other strategies to help with selling internationally:
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