While it doesn’t address the topic of consciousness, you might find some of how this sort of “backwards in time change” is being applied today interesting:

https://phys.org/news/2023-10-simulations-scientific.html

Additionally, the philosophy of quantum measurement is kind of up in the air after a 2020 experiment:

https://www.science.org/content/article/quantum-paradox-points-shaky-foundations-reality

Which led to what’s currently my favorite titled paper, Stable facts, relative facts: https://arxiv.org/abs/2006.15543

So one of the challenges that would arise from layers of delayed/hidden observations would be whether you’d even have universal agreement at the final review. i.e. The computer might have observed the cat as alive and baked a cake celebrating it, but then you open the box to a dead cat, each having correctly observed a result, just separated enough that they didn’t need to agree.