Viewing overall product sales for a certain country

You can see sales per country on an individual product, variation, or category on their sales pages, as shown below:

If you would like to see the sales by country at the overall product level you can used the Segmenting Tool on the Products or Variations page at the top.

After segmenting it will show you all the sales for each product for that country for the date range selected in the date picker.

You can also save a segment for each country so you can access them even easier in the future, and also add them to the dashboard when adding a new card for easy viewing.

(Ref: How to add a custom segment to the dashboard)