Which is what I said above COULD have had a meal on the first.
Now if you hatched them I will assume you have limited experience in getting hatchling started, and you still need to do what I linked above, hatchlings can start to eat anytime after their first shed from as soon as 24 hours after that first shed to 6 to 8 weeks after that first shed, depends on the animal. Right now all you can do is keep trying at least for the next 3 weeks with live mice and after that try live rats if it does not work.
Do not offer more than once a week.
If at 6 weeks they still have not eaten than it will be time to address the issue differently if they are kept optimally to start with and fed the right prey.