Welcome @bobo333, It sounds like you have been through the wringer trying to get your neuropathy diagnosed and treated. My neuropathy has been with me many years and started in my toes as numbness. I've never had any pain with it, just the numbness and some tingling at times. I shared my neuropathy journey in another discussion here - https://connect.mayoclinic.org/comment/310341/. I don't believe my neuropathy was caused by nutrition or vitamin deficiencies but I do take vitamin supplements known to help with neuropathy in hopes that it will prevent any further progression. Here's some information on this cause for neuropathy:

-- Nutritional and Vitamin Deficiency Neuropathy:
https://www.foundationforpn.org/causes/nutritional-and-vitamin-deficiency-neuropathy/
While you wait for other members to respond to your question, here is a search of Connect showing the posts and discussions by members mentioning neuropathy from vitamin deficiency - https://connect.mayoclinic.org/search/?search=neuropathy+from+vitamin+deficiency