I had a doe (with a young litter) suffer a fracture of a hind leg. I tried splinting it, but she kept removing it, so I left it to heal on its own.
The leg was crooked, but she got around just fine and had another litter for me.
If you have a rabbit with a broken bone, you do need to watch for signs of pain and discomfort, such as teeth grinding. My doe never showed any signs, otherwise I most likely would have culled her to end her suffering.