Chick not walking properly

[Part0786ridge]

I hatched some partridge eggs and had one hatch 6 hours early, and it's yolk sack was exposed, I've managed to get it to absorb its yolksack, but know chicks that have hatched 6 hours ago have started walking around, the chick has tried to join them but keeps waddling on its belly not using its legs

 

[Wyorp Rock]

See if this is what your chick is doing. You may be able to fix the legs. I would also give the chick 1/4 tablet B-Complex once a day.
If you have photos or video that would be good too.
https://the-chicken-chick.com/spraddle-leg-in-baby-chicks-what-is-it/