The lack of appetite/and reluctance to drink is normal with birds suffering from trauma, but I'm afraid it can take a grim turn if she continues to not eat, or drink much. White blood cells, like neutrophils, are her natural defense to fight bacterial infections. The cells maneuver around and destroy the bacteria, but are unable to where there is a lack of liquid in the blood, and among other things, so it's very important she stays hydrated.
It may be a good idea to order tube feeding supplies in case she continues to act reluctant towards feed/water. Tube feeding may look scary, but it is fairly easy once you have a hang of it. Tube feeding consists of sticking a large smoothed end tube down her esophagus into her crop to fulfill her nutritional/ and liquid needs.
To tube feed, you need a large 60ml syringe, parrot baby feeding formula, or gamebird feed crumble. You also need a gram scale to calculate her weight and a tube to pass into her crop. For a tube, a French red rubber catheter size 20 would work best, but you can also use aquarium tubing, and melt down the tube to prevent damage to the esophagus.
Here is some info on tube-feeding :
https://www.backyardchickens.com/threads/tube-feeding-ducks-updated-5-7-2020.1211994/