Certainly get more than one opinion. A vet wanted to put my mare down for a small fracture (not a full on break for sure) got a second opinion and we were back to racing again in 3 months. No, it wasn't an easy road to recovery - had to fully wrap her front leg every 3 days for a month and keep her stalled.
Prayers for recovery!
It will heal fine. As long as it’s non-articular they are able to heal well and be sound. One of my best horses had a coffin bone fracture in his left front. He had a long career. I hope this helps.