Despite the series insisting that the Great War was a global, thermonuclear event, the franchise has only visited several locations in the United States, even in its outing as an Amazon Prime Video series.
It isn't as though other locations don't exist in a similar vein to the post-apocalyptic ruins of America, since there are characters from other countries, like Zao from With the mod in the news, it brings attention to other international locations which the post-nuclear survival series could take place in.
Bethesda is no stranger to its players wanting to expand the worlds that its games create. Large-scale mods going beyond the initial boundaries of a Bethesda title are known to happen.
Examples lie with and two of its most famous mods, ,which adds the northern region of Cyrodiil, and ,which adds the DLC-sized plane of Oblivion, Coldharbour.
In the future, Bethesda could do this itself with the series thanks to having a wealth of international options at its disposal.