Under the Keyword Explorer section where the "What's Trending" menu lives, there is a drop down list of available countries. If you are wondering why a particular country is not listed please see the following.
TubeBuddy currently pulls information from Google's daily trending searches located here: https://trends.google.com/trends/trendingsearches/daily?geo=US
If you find that the country you are inquiring about is present in the Google daily trending search results but not yet listed in TubeBuddy drop-down menu, please send us a support ticket so that we can look into including the missing country.