I can really relate to all that is being discussed. I had Covid and doctor wanted me to take Paxlovid due to medical and age high risk. Neuropathy first landed in my big toe, left foot. Very painful and it followed several months after my second Pfizer booster. My diet is very healthy Mediterranian (pn). I found that by drinking a glass of water the pain would go away then it hit the toe next to my big toe and I tried the same therapy. It worked and in its' own strange way it became a blessing, as I am now taking better care of my feet i.e., shoes, hydration
with lubricants and socks. Hope this simple trick works for you. It has been a very mysterious year.