That is a pretty deep wound, and I personally feel taking her to your vet, when you can, would be the best idea. My concern here would be the underlying damage beneath the wound, internally.
The best thing you can do for now, is moving her inside, into a warm, dimly lit area, with feed and water provided. If you haven't, for wound care, trim the feathers around the wound, flush the wound well, with some saline to lavage out, and any debris, and feathers. Then slather on an antibacterial ointment like Neosporin, or Preparation H which is used quite frequently as it increases the respiratory component in the epithelium layer of skin, encouraging healing. Silver silvadene cream is in most vet offices as well.
I'm personally not a fan of Blu-kote, for the reasons that it stains the wound, and surrounding feathers blue which makes it hard to accurately monitor, and some of the ingredients such as isopropyl alcohol, can be damaging to the healthy cells. Use what you feel most comfortable with though.
More pictures would be better, but looking at how deep, and damaging the wound is, adding some gauze/padding overtop, and wrapping may be advised too.
Antibiotics for infection would also be advised. Here are some you can get online :
https://allbirdproducts.com/products/baytril-10
https://www.chewy.com/fish-aid-antibiotics-clindamycin/dp/185216