There are some countries that Shopify Payments isn't available yet due to problems with government laws or taxes. Technically, you can change your store address in the Shopify Dashboard’s General Setting to have access to Shopify Payments. However, if Shopify spots that you are not from a Shopify Payments supported country, they will deactivate it from your Shopify account. It doesn't affect your use of Shopify, but you will not be able to use Shopify Payments anymore.