Magnetic rings

[Om83]

My feed is full of ads for magnetic rings promising to help reduce stress and perimeno belly.. the reviews vary widely, and whilst I don’t expect miracles, I would be interested to hear from anyone who has actually used one of these things and felt some positive benefit?? Or is it a complete scam? This is the type of thing I mean.
https://uk.oluxring.com/

This is what AI thinks. I've highlighted what the general con is.

Magnetic rings are available both as wellness products, often made of copper or stainless steel, and as fidget toys for stress relief. The wellness-oriented rings often claim benefits for pain, inflammation, and general well-being through magnetic therapy or acupressure, although scientific evidence for these specific claims is lacking. Fidget rings, usually made of plastic, are designed for spinning and manipulation to keep hands busy and relieve anxiety.