I had that happen to one of my chicks not to long ago. We splinted the leg and kinda used a tiny rubberband with a tiny cut straw placed in the middle. Hooked both legs together so they would not split. Gave her a vitamin B supplement and electrolytes.
She was fine in about 3 days.
I will look for the photo I took. I used sports tape wrapped around a small Gauss so it would not stick. Some people use band aids for splints. Splayed leg I presume.
They grow fast. So she will heal fast it you correct it asap!
Welcome to BYC by the way! I hope your chick the best!