I'm with you on the so much fraud part Jake. I've always had hope in stem cell and PRP but have not seen any evidence that it works for neuropathy but have seen a ton of advertising it as a cure from the so called neuropathy clinics around the country. I always try to evaluate treatments using a few of these sites:

FDA's Health Fraud Page
-- https://www.fda.gov/ForConsumers/ProtectYourself/HealthFraud/ucm539101.htm

NIH's National Center for Complementary and Integrative Health (NCCIH) which offers guidance about integrative health and how to evaluate it.
-- https://nccih.nih.gov/health/decisions
-- https://www.nccih.nih.gov/health/pain

I've had one of those cheaper leg/foot devices that squeeze and release your feet with air. I suppose that would be a poor mans intermittent pneumatic compression therapy. The one I had you just slipped your feet into it and turned it on for a foot massage. It did make my feet feel a little better but didn't seem to help with the numbness for me. I did find a couple of articles on the devices and their use that were kind of interesting.

-- Influence of intermittent pneumatic compression on foot sensation and balance control in chemotherapy-induced peripheral neuropathy patients:
https://pubmed.ncbi.nlm.nih.gov/34717200/
-- Risks and contraindications of medical compression treatment – A critical reappraisal. An international consensus statement:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7383414/
I try to keep my feet hydrated using a skin moisturizer every night which makes the feet feel better massaging the lotion into the feet.