The post-apocalyptic section on Flibusta is typically categorized by the nature of the "end of the world":
Stories like The Stand by Stephen King or Vongozero by Yana Wagner.
Works in this genre generally follow a specific structural evolution: Постапокалиптика - Википедия
Focuses on survival in a radioactive wasteland, such as the Metro 2033 Universe by Dmitry Glukhovsky.