Are they duck eggs, or chicken eggs, or some of each, or are you not sure?
If they are duck eggs, you can just go back to non-lockdown conditions until it is the right time.
If you do not know whether they are duck eggs or chicken eggs, you can look online for pictures of candling chicken eggs and candling duck eggs, and try to figure it out by how developed they are.
If you really cannot tell, I would probably leave them in lockdown and hope for the best. If they don't hatch by about day 23, candle again to try to see whether they are still alive. That's late enough that chicken eggs should have hatched, but still too early for ducks (you wouldn't want to leave dead chicken eggs in the incubator for an extra week.)