Correct Gait After Compound Break And Short Leg

Hi, I am conerned about my mom who had multiple surgeries to fix a compund fracture of her right femur and shattered knee cap. The knee replacement is fine and the femur ws repaired but ended up being shortened by about 1-1 1/4 ". Therefore her gait is off and walking, even with the walker, is difficult. I think an orthotic in her shoe to even out her leg lengths would work but her doctor says no. I am at a loss to help make walking easier.

She has carpal tunnel and her hands have been hurting because of the pressure she has been putting on the walker to even her gait. Any suggestions?