In the future, Winden has suffered some kind of cataclysmic accident, referred the apocalypse, which has partially destroyed a number of buildings and killed those inhabitants who weren't in some bunker.
What is the state of Germany as a whole, to say nothing of those regions beyond it, in this future? One would think that something that wasn't even energetic enough to destroy all the buildings or kill the people in a bunker well within the blast radius wouldn't have much effect outside of Winden. On the other hand, it is called the apocalypse.
The state of the survivors seems ambiguous too: on the other hand, they seem to be in bad shape, and one wouldn't think that people would be scrounging for scraps in the wreckage of Winden if there were less-damaged areas, although they do seem to have "religious" reasons to hang around. On the other hand, they're driving around in a tank and wearing military uniforms, which would seem a bit weird for random people, and suggests a functioning government. And there was that rather large drone flying overhead in the first glimpse of the future at the end of the first season, which definitely doesn't suggest a population of scavengers struggling to survive.
So what is the state of the rest of the world after this apocalyptic event?