Post postmodernism is apparently metamodernism, or in technical terms, having read this, bollocks. This idea of truth in narration where truth isn't defined is indicative that this is an unreliable narrator writing. That ot doesn't even attempt to link it to the question of narrator on the real world and our problems with that makes it seem simplistic.
https://iai.tv/articles/the-death-of-the-unreliable-narrator-auid-2694
