Hi Duck!
Hope you've had success with your little cutie. I'm an absolute noob but, had a similar experience with my first hatch. One of them had leg issues and I tried everything!
Your vet wrap looks a lot better than mine did. I tried that and the hair tie brace using a short piece of rubber tubing in the middle.
It was stressful for the chick and me because I was doing it alone. After wearing both braces for a couple of days, the chick would improve and be able to walk for a day but by morning we were back to square one.
Finally decided the stress was too much for both of us to put another brace on so, I put it in a cup, checking it often and giving it water and sav-a-chick by dropper until it refused to take anymore. I would take it out to let it eat and then back in the cup.
It fussed and fussed and jumped up and down in that cup. Neither of us liked it at all, and I did leave it in the cup to sleep overnight. This went on for a couple of days but, in the end, that's what finally worked for us.
It's now in the brooder with the others. It was very vocal and fussy for two or three days afterward and is smaller than the others but, it's quieter and calmer now, getting around great and enjoying life.
Realize I'm late in replying to your post but wanted to share my experience with you and others who may find this thread later.
Again, hope your adorable chick is up and about and doing well!