ThisisBigBrother.com - UK TV Forums - Tribes of Europa (Netflix) (2021)

https://www.netflix.com/title/81002769

german sci-fi, those who loved The 100 might also enjoy this one

Quote:

Set in 2074, three siblings set out to change the fate of Europe after a global catastrophe causes Europe to fracture into dystopian warring tribal micro-states who vie for dominance over the other states. Three siblings get caught up in the conflict when they come into possession of a mysterious cube.

among the cast James Faulkner (better known as Randyll Tarly from Game of Thrones)