There are two issues that I can see:
1. The distal AP screw is out of the nail. This is a blunder.
2. Length of nail and it's insertion is too proximal ..that's not required in a distal fracture. This extruded nail might be blocking knee movements.
Fracture does not seem to be united, you should might have to get reoperated as this nail may injure the femoral cartilage and condyle on bending the knee.
Next Steps
If you have this impingment then you have to get operated.
Not walking or bending knee is not the solution .