This is sounding more and more like she's experiencing temporary paralysis to me but obviously,I'm not a vet. Permanent spinal injury will usually manifest as no movement below the injury or so-called 'spastic' movement, i.e. involuntary jerks and spasms.
From what you've said, Ginger's movements are deliberate. The fact she can shift her tail prior to defecating, is responsive to pressure on feet and legs etc is all very positive.
I really think she needs lots of time to heal as best she can, now.
It might be an idea to start physio on her legs in a couple of days too, as we don't want her muscles to atrophy.
I used to give Peggy hydrotherapy by placing her in a warm bath, filled to her hip height. At first I just used to flex and stretch her legs whilst she was stood in the water. Then, as she got stronger, I used to walk her round the bath using grapes as a bribe. I'd also add Epsom salts and lavender or another essential oil. Hydrotherapy could be helpful for Ginger further down the line.
Also, when you do put her in a sling, ensure her feet are in contact with the floor. We want her to be able to feel the ground beneath her.
She is probably going to experience neurological pain for some time. If she's really struggling with it, you might be able to get a vet to prescribe gabapentin but that's all further down the line. There are less effective options to try too If she needs it.
Something you can do now is give her vitamin C. Recent studies show supplementing vitamin C can actually regenerate damaged nerves.
The dose for chickens is 250 mg/kg body weight. Give it daily for 2 weeks. Any she doesn't need will be excreted, as vitamin C can't be stored in the body. Very large doses can cause diahoea and, rarely, kidney stones but should be fine in the recommeded dose. Vit C will also help her with any sress she might be experiencing.
I found the link to the poop chart I use and find helpful:
https://chat.allotment-garden.org/i...1bab29a02f762&topic=17568.msg215714#msg215714
Also, you might want to check out these stories:
"Case Study: Neurological Damage"
https://bitchinchickens.com/2022/02/28/case-study-neurological-damage/#:~:text=CONTACT-,Case Study: Neurological Damage,-BY BITCHIN' CHICKENS
"How We Lovingly Healed Our Chicken With a Broken Neck"
https://realfoodrn.com/how-we-lovingly-healed-our-chicken-with-a-broken-neck/#:~:text=How We Lovingly Healed Our Chicken With a Broken Neck,-Welcome to Real
I'm not convinced the last pullet had actually broken her neck but she definitely had some kind of spinal issue. That neck collar is just genius!