Do you mean, when after it sheds, you wanted to feed it or not but you dont know if it need to be fed?
They'll eat their first shed and maybe 'll go without food for few day and so probably feed it couple pinhead crickets. I'm not sure if they would eat more after shed.
I have small mealworms in the tub as soon as the babies hatch. I've had hatchlings eat a worm within the first 24 hours. Most will wait a few days though. My point is, I make food available so that they can eat whenever they want which is ideal for optimal growth.
Feeding freshly hatched geckos is always something quite impressive. You might think to yourself, "how can i get this gecko to recognize what is food?" Well reptiles are quite different than humans. They have already in-scripted in their DNA how to survive, instincts.
Your gecko is already feeding and receiving nutrition the second it pips the eggs. Your hatchling absorbs all its egg yolk though its umbilicus, that is your geckos first meal and is enough to get it through its first shed.
After you gecko shed (usually 3-5 days after it hatches) it is a good time to start feeding. Remember water should always be present, and you gecko should have high humidity until it sheds. If you are feeding crickets i would start them off on 3 1/4" crickets (pinheads are way too small) or you can start them right off on mealworms (1/2" usually work very well). Once the gecko RECOGNIZES the mealworms/crickets as food and is eating 3 prey items, you can go ahed and increase the amount you feed.
If your gecko doesnt feed, dont give up and keep trying. But remember, survival of the fittest, sadly some geckos are just not meant to survive and dont thrive. This is where as a responsible breeder culling comes into place, but this a whole other topic. DONT LET THIS DISCOURAGE YOU! Many and most geckos thrive and do very well!!!
Please remember, this is just how i do things. Many people do it differently, but i think having a gecko in a stress free environment until it is feeding regularly is key to its future progress. I dont like to overwhelm hatchlings with food, until they know what it is.