I had 2 quail eggs that were sitting in the incubator for a whole day longer than any of the others. It didn't make any progress so I decided to crack it open. Tt had its brain sitting outside of its eye socket, is also didn't really have a top beak. It died after about 2 seconds.
I'd cull that chick, considering the complexity of a skull and how the brain is encapsulated perfectly within a moist environment maintained at the correct pressure.. There is no way to mimic that