How to filter channel analytics by country.
Developer Dashboard > Channel Analytics
Inside the Channel Engagement report, click the Filter dropdown and change the Channel Store Code field value. Once you click into that field, you'll see a dropdown appear of all channel store codes where your channel is published. Select the desired country. Click "Run" to update the report's filter.
For a guide on which country is represented by the abbreviations, you can review the "Using Channel Store codes" section on our Analytics Support documentation.