Magento store often receive payment from global customers, so it’s important to understand the Magento 2 country setting. The Magento 2 Country Options identify the country where your business is located, and the countries from which you accept payment.
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To set the country options for your Magento 2 store:
On the Admin sidebar, tap Stores. Then under Settings, choose Configuration.
In the panel on the left under General, expand the Country Options section, and do the following:
a. Choose the Default Country where your business is located.
b. In the Allow Countries list, select each country from which you accept orders. By default, all countries in the list are selected. To select multiple countries, hold down the Ctrl (PC) or Command (Mac) key.
c. In the Zip/Postal Code is Optional for list, select each country where you conduct business that does not require a ZIP or postal code to be included as part of the street address.
d. In the European Union Countries list, select each country in the EU where you conduct business. By default, all EU countries are selected.
e. In the Top Destinations list, select the primary countries that you target for sales.
When complete, tap Save Config.
Done! Above is a simple guide about Magento 2 country option. I hope that you can set a suitable country code in Magento 2.