I don't think I've come across a found footage or horror mockumentary about an unaired reality show.
Why hasn't this happened? I'd love a well-done Marble Hornets or Blair Witch Project about an 00s Survivor or Fear knock-off that ended in disaster. The show was never aired, the deaths covered up.
The first episode would be about the lost media search and its eventual discovery.
I learned about this late 90s MTV show called Fear. I'm watching it now on YouTube. They get kids to film themselves doing challenges in haunted places. Its production was ethically dubious. (They made up most of the backstories and wore out the kids before shooting.)
But I'm like, this + Survivor + corporate coverup + lost media meta story + ARG.