So... is Shuumatsu Nani Shitemasu ka? Isogashii desu ka? Sukutte Moratte Ii desu ka? finished or not?
NO, it is not finished.
Why?
We found unfinished non-core content:
Shuumatsu Nani Shitemasu ka? Iden: Lillia Asplay (Spin-Off)
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Synopsis
Willem, a hero from the past, awakens after 500 years to a world ravaged by monstrous Beasts. Humanity is gone, and the surviving races live in fear on floating islands.
Now the last of his kind, Willem takes a job caring for a weapon storehouse, only to discover that the "weapons" are actually young Leprechauns destined for battle.
He finds himself acting as a guardian to these brave, but self-sacrificing, girls, especially Chtholly. He struggles with his helplessness, watching them fight the very monsters he once battled, and hopes they will return safely from their dangerous missions.