You have my complete sympathy, both for the symptoms and the challenges finding help for something that is as rare as non-oncological DIPN -- in my experience, no one really knows what to do about it. Although to be fair, pretty much no one knows what to do about oncological DIPN, either. I've got a running weekly JAMA search on DIPN, and it keeps coming up with essentially nothing of any use, arguing that it's even an unpromising study area. (A search for tirzepatide or semaglutide, however, produces dozens of results every week. None of which, of course, mention DIPN.) So completely agree with @johnbishop : about the only thing you can get from a neurologist is advice on how to keep it from getting worse (avoid vitamin B6, for example). Beyond that, this is a great forum for finding practical things you can do to just cope, like, for example, orthotics or shoes or socks.

Welcome to a very special club!