I am sorry to hear about your medical problems. Yes, gait issues can come up due to neuropathy or myopathy. This happens due to knee locking caused by misalignment of the bones and muscles around the knee. Also, with neuropathy, the sensations associated with walking decrease. This also affects the gait. Muscles and leg cramps can also be due to dehydration, electrolyte imbalance, intermittent claudication due to clots/thrombus in blood vessels, or due to muscle fatigue. I suggest you consult your doctor to rule out these causes. Also, please consult a physiotherapist to strengthen the muscles of your limbs.
Hope this helps. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.
Thank you very much DR Mathur