I am surprised that your doctors did not refer you to what is called here an Accredited Practising Dietitian about your NAFLD. An APD is a health professional who could review your diet with you and then suggest healthy changes.

My understanding is that PN is a common side-effect of diabetes. As you say, both Nerve Conduction Studies and EMG are routine diagnostics.

This background information may help you.

Diabetic neuropathy: Types, symptoms, and causes