Agreed, this looks like a very bad fungal infection of some kind, there are many different types of fungal infections they can contract, most of which are extremely contagious and are spread by moisture. So you're much better off to not actually give her a "Betadine
Bath", but rather to just dilute either the Betadine or better yet use Hibiclens instead and do NOT dilute the Hibiclens, but rather just dab some on a clean, dry, sterile cotton ball or piece of gauze, and then blot the Hibiclens on each individual patch/lesion. Hibiclens is more effective against fungal infections, and when you do not dilute it and just blot it directly on a patch/lesion, it acts as a protective barrier against most all fungi, bacteria, parasites, etc. so that she doesn't get any secondary infections. Just do that once a day, or if you want to just continue to use Betadine then just dilute the Betadine with water and dab it on the same way, instead of actually submerging her in diluted Betadine, as this will likely not help and actually make it much worse. Then do not rinse off the Betadine or the Hibiclens (especially the Hibiclens), you only need to lightly dab it on each area then let it dry, and then apply an over-the-counter Antifungal creme like Lamisil or Lotrimin (do not apply any topical antibiotics, as they will only make a fungal infection much worse).
You need to disinfect her entire tank inside and out and everything in it with F10 disinfectant, as if this is Yellow Fungus (no idea until you get a simple Skin Scraping Test done, which should be done ASAP so you can start oral Antifungal medications, like Voricozanole immediately), bleach will not necessarily kill it or other types of fungal infections. It also will not kill Coccidia and other protozoan infections, so using a reptile-specific disinfectant like F10 is best, especially since you have so many other reptiles, and no matter what this is, it is likely very contagious to all of them, and possibly to you too. Disinfect everything inside her tank, the tank itself inside and out, wipe down her light fixutres, everything with very hot water and F10, dry it well, then put down paper towels and replace them at least once a day. This is the best way to keep it from spreading and reinfecting her while she's being treated.
I would think with so many reptiles that you have a very good Certified Reptile Vet, so you need to make an appointment for her ASAP to have a Skin Scraping done immediately, because if it is a fungal infection that grows both internally as well as externally (like Yellow Fungus) she needs to be put on Voricozanole or another appropriate prescription oral Antifungal medication immediately, as the topical/external treatments will only serve to at the very most slow down the external spread of the infection, but the only thing that will treat it internally and give you any chance of getting rid of it is long-term treatment with an oral Antifungal medication.