Can the supply curve shift while the PPF does not shift?
Edited.

PPF is the maximum potential output that a country could produce using its resources and technology. No, the PPF should shrink due to the loss of labour (from leg injury).

No, factory is a stock of capital, thus, ppf should shrink due to loss of capacity. It is also affected by the technology of production i.e. methods of production. It moves outwards due to technological progress.