Some researchers suggest that a low FODMAP diet could prevent high pressure in the colon, which, in theory, could help people avoid or correct diverticulitis. In this diet, people avoid foods that are high in FODMAPS.
I have found a FODMAP diet so worthwhile. However, I went on it because I have IBS-C. My father also had IBS and then diverticulitis. I worried about my "gut health" taking me in the same direction.
Not having the contents of my gut filled with things I cannot digest has dramatically improved my overall health. However, the part which relates to your condition is the fact that I rarely, and never to the extreme it used to be, now suffer from constipation. I do have to know what I can and can't eat and the finding out stage is hard work. However, over the years, it has become much easier.
I also have neuropathy. Since I have sorted my diet out and therefore don't have the pressure from my gut this has not only stopped getting worse but I believe, improved (no testing for the last two years because of Covid). My guess, and that is all that it can be, is that the bowel pressure pushed against my spine and affected the nerves - but I am not a neurologist! It just makes sense to me.
Have a look at the Monash University site; www.monashfodmap.com/ they did the research (and still do). Also, you may find this interesting. www.ncbi.nlm.nih.gov/pmc/articles/PMC5095569/
If it does ring any bells it might be worth asking your doctor about trying it. If you do try, I am happy for you to PM me for any help I can give or just as a sounding board for someone who has gone through this.
Can I add that this is only an opinion based on reading the research, a very helpful doctor who suggested I try it and a wish to help