Yeah, that's a good point... I've been seeing on Reddit that:
[spoil]People believe that she is an unreliable narrator, so everything that we see from OA's POV can't be trusted. And you have to wonder, when the kids were looking up the other trapped people, that they would look for Homer, but they never do.[/spoil]
Also, just had a random thought that I don't really have any basis of factual evidence on, but I wonder if:
[spoil]OA's story is true, but she wasn't trapped there with four other people, she was trapped there alone, and in a fragile psychological state, made up her fellow cellmates when in reality, it was all her and only her...[/spoil]