Scrambled egg can be good.
Many chickens like their food better when it is wet: just add water to the usual pellets or crumbles. (In this case, use the water with Corid in it, so she gets her medicine that way too.)
When treating with corid, do not give any supplements that contain Thiamin (one of the B vitamins). So for any vitamins, or electrolye mixture, or other supplement you need to carefully read the label, or just skip them all until you are done treating her with corid.
Make sure she has access to oyster shell or egg shells as a calcium source.
If that does not fix the soft shell eggs, she may feel too sick to eat them, or she may have some other problem that prevents her body from using them properly, so you might have to try something else. But leaving them available to her is the easiest thing to try first, and should not cause any new problems.