Beers of Europe sells a few lagers from Fiji.
Bien Manger (https://www.bienmanger.com/) ships to the UK. Not sure about now, but at the start of the year they had beers from Bolivia, French Polynesia, Madagascar, Reunion and Senegal.
There are a couple of Ghanian restaurants in London that sell the national beer: Sweet Handz (Holloway Road) and The Gold Coast (Croydon).
I believe it’s also possible to find Georgian beer in Georgian restaurants in London.
