You have done all the right things. I can't think of anything else you can do. If she doesn't have any serious internal injuries she will probably be all right.
Feel the leg to see if anything is broken. If it is you can splint it. Other than that, give her time to heal. Put her in a small area so she doesn't have to move much to get to feed and water.
Shock will immobilize a chicken. I have picked several chickens up off the road that had fallen off the truck. They were awake but they just stayed there like they were frozen. I put them in a warm semi dark quiet place and they came around. There is some controversy about peroxide but I have...