I don't think there's an egg eating problem, but I am not a vet.
At this point, with an open wound, I would not start the clear iodine treatment. I would, until the wound closes, rinse with saline or vetericyn, put the cream on, and stick with that.
Once the broken skin is healed, I would soak in Epsom salt - I use compresses, but some folks stand the duck in a small bucket or bowl. No drinking the Epsom salt water, it is a laxative. Or, just let the duck float in some lukewarm water for half an hour, to soften the skin. Then put a couple of drops on the bumble. Do not wrap the foot after that. Do not treat the foot for four or five days, but do check it daily.
If it starts looking worse, if you can get to a vet, please do.
Hopefully, a black scab will form and after several days you soak the foot again for a while and see if the black scab will come off with very gentle pulling. If not, a few more drops of clear iodine, wait a few more days, try again.
If it works the way it has worked for a number of people, the scab will come off and take a bunch of yuck with it. Often one can see nice, new, healed tissue once the plug is removed. Sometimes it needs another round of clear iodine and waiting.
Have you started her on oral antibiotics? I am thinking that I would. And in that case, I don't think it is recommended to eat the eggs.
(You can make paint with them though.)