Yeah, give it a few days before trying to feed it. If they eat too soon it can cause big issues with them not processing the yolk sac they absorb just prior to hatching.
Often times newly hatched pups are hard to get eating (which is reason #1 I never suggest buying an egg - especially for a shark rookie). Have a lot of foods ready - salmon works very well. Don't 'fast thaw' anything (by using water). Thaw it properly (slowly in the fridge over night). Young might take well to live food like ghost shrimp at first as well. Always a good trick to use.
I hope he has a game plan for a bamboo shark that will likely be over 4 feet long.