I am not quite sure what you are asking.in the afternoon took the chicks to the waterer and never returned to the eggs. she even make them eat... isn't this too soon?
Is it too soon for her to leave the other eggs? Not really, because some hens will keep sitting for longer than others, after the first chicks hatch.
Is it too soon for the chicks to eat? Not a problem. Newly hatched chicks can go several days before they start to eat, but eating sooner will not hurt them.
A hen gets really red comb and wattles when she lays eggs.her comb and wattles are very pale now.
Any time a hen quits laying eggs, her comb and wattles get pale. This happens to broody hens and to molting hens.
So I think her comb and wattles would be pale right now, with or without mites.
Chick starter is good for the chicks, good for the hen, and easy for the personshould I give her something to help her recovering?

I'm happy with these two chicks, they are beautiful. should I check something to see if they are healthy? I always read about checking for pasty butt, there's something more I should watch for?
Watch them for a little while each day--make sure they are both there, and that they eat and drink and move around acting healthy. They will probably be fine.
I have seen chicks that got into a corner behind something and needed help to get back out, and I have seen a chick that got stuck in the mother's feathers (two feathers were glued together with a piece of poop, around the chick's neck like a collar.) In cases like those, once you see the problem, it is easy to see how to fix it.