Probably what Amy said but I’ll ask some silly questions. Were they turned for the first two weeks of incubation? I know they were shipped eggs but were they stored for a while without turning them? Did you incubate them pointy side up or incubate them on their sides without turning them?
I almost never hatch shipped eggs, just my own. The only time I’ve seen anything even close to that was when I put some older eggs in the incubator that had been stored over two weeks without turning since I had extra space in the incubator and wanted to see what would happen. The vast majority didn’t even develop but some had the yolk stuck to the side. None of them hatched but I could see something like that happening if one of the ones stuck to the side did develop.
At this stage, you are in lockdown. What real option do you have but to see if they hatch? I wish you luck. Amy’s pretty good. If she says they have a chance, they probably do, though I’d not expect 100%.