Please help--So many questions

Edit Post

Hello,

My nephew traveled abroad and secretly got a leg lengthening operation without telling his parents. He is 20 years old. Even though he is an adult his parents are so worried about him because he doesn't share any information about the surgery or how it's going. He got the surgery in late February of this year. He got the precision. He looks okay but still walks very stiffly. He is not really doing the body therapy that would be expected so my sister is pretty concerned he won't heal correctly. What could go wrong if a patient doesn't do the proper therapy? How often should physical exercises be performed after the surgery? I would assume every day but I would like to know what experts out there say about it. Now that he's home--not abroad where the surgery center is--isn't he supposed to see an orthopedic surgeon at home to check on his condition? He is communicating with the surgeon who worked on him by messaging but to me that doesn't seem like enough doctor care. What do you think?
Question #1 What could go wrong if a patient doesn't do the proper therapy?
Question #2 How often should physical exercises be performed after the surgery?
Question #3 Is he supposed to see an orthopedic surgeon at home to check on his condition?
Thank you so much for your input. Bless you.

Edit Post

Thank you so much. Your words make a lot of sense and help me understand better.