Ethiopia, first exporter of Africa, is not included among the 10 World-largest coffee exporters. Five European countries that do not grow coffee are listed among the major exporters (Germany, Switzerland, Italy, France and Belgium).
This can happen because the process of roasting and flavoring coffee beans are highly consuming power and water. Poor countries, most of the producers, choose therefore to export cheap beans to richer countries that will handle the process.
Source: https://howmuch.net/articles/world-map-of-coffee-exports