I don't exactly know whether cycluras have the same physiology and are subject to the same illnesses as Iguana iguana. But I'm responding as if she will benefit from the same things as an Green Iguana.
BTW, her excellent lab results show that you are doing a very good job with her.
This does not seem like a real problem at this time. The good things are that she eats enough food and does leave her bed to roam her enclosure. After you prepare her food, drench it in water before putting in her dinner plate.
You can try these things:
Try raising the heat, and increase her photoperiod, to imitate a seasonal change to Spring. That could activate her. But make sure that the cool side of her habitat remains at 70F to 80F. After a month or so, return her photoperiod and her temps to normal.
Is her nest in the cool zone or the warm zone? Is her poop normal, without undigested food?
She could be having nausea or cramps as an after-effect of the antibiotics. They may have killed off her beneficial gut organisms. Find an avian vet for bird probiotics, which most closely match your cyclura's natural gut organisms. But her steady appetite shows that her gut is healthy. However probiotics can't hurt her.
I hope she normalizes soon :-)