Can a fall break a dummy's bones?
Yes. The official Ragdoll Engine page for Ragdoll Co's solo experience explicitly lists bone-breaking falls. It also describes dummies reacting to the location of a hit.
That establishes the feature, but not a formula for it. The reviewed description does not specify which heights cause fractures, which bones break first, or whether every fall produces an injury. It does not describe how the game calculates collision forces internally.
Can you heal broken bones?
The listing says R revives everyone. It does not state that this key heals fractures, nor does it describe a separate bone-healing procedure. Revival and fracture recovery should therefore remain separate claims.
The same official page mentions wounds that bleed and dummies that can stagger, faint, crawl, or bleed out. It does not attribute any particular movement change specifically to a broken bone.
Use the official game link to check later updates. A precise fall-damage table or healing walkthrough would need additional evidence from this exact experience.