To identify if it is lice eggs a picture of her dry would be in order, but it doesn't look like it to me. I know she was recently treated with ivermectin when shipped. Could it be poop around her butt? Does it appear to be bothering her? Also, check her crest. If it is mites the egg clusters are more frequently found in the crest on silkies, before it becomes that bad elsewhere.
I do not believe DE is sufficient as a lice treatment. Another reason to be careful with DE is it is very harmful to the lungs of animals or people when inhaled, which is a concern for me when it is used in dust baths. Unlike normal dust particles, part of what makes DE useful is it's abrasiveness. Just think, these sharp little grains cause cuts and scratches in an insect's hard exoskeleton. This is how DE kills, the insect dehydrates and dies when the exoskeleton is breached.
Imagine that inside the lungs.
Also, since it requires direct contact with the insect moving over it, I am concerned it is not as effective for mites or lice as people assume. Is it appropriate when you never see lice or mites? Yes. Is it appropriate as supportive treatment after treating a lice or mite infestation? Yes. Is it good as a SOLE treatment for a silkie with lice or mites? I say no. Based on my experience with silkies, DE alone is not a lice or mite management or treatment program in and of itself. Used in conjunction with a program that rotates through the use of chemicals such as sevin, ivermectin, frontline spray, permethrin, etc it probably does extend the amount of time needed between treatments.
Do I occasionally see mites or lice? Yes, it happens. Lice get carried around on wild birds, get picked up at shows, escape the most recent chemical or non-chemical treatment, and I keep an eye out for them. If a bird has gotten to the point where there are any egg clusters, I give them a flea bath (adams flea shampoo).
Silkies are more prone than any of the other breeds I have experience with- more susceptible than polish, welsummers, cochins, wyandottes, sex links, etc. The lice seem to just LOVE the crest, and they are easily seen around the vent.
They almost look like scabs, not eggs, from irritated skin which could be from lice, mites, or something she is sitting on or coming into contact with in her environment. Do they peel off of her skin? If she is a good health and weight, I would give her a flea bath and check her again in a couple of days. I would also take note of any products (deodorizing, DE, etc) that I use in her pen... are there any grooming products you are using that she might be sensitive to?