Seeking information on Magnetotherapy of the tongue

I’ve never heard of using magnets on the tongue. In TCM theory the tongue reflects the conditions of the interior and therefore is a useful diagnostic tool. There are technically acupuncture points on the veins on the underside of the tongue though I don’t know of anyone or any style that actually uses those points in clinical practice. My own impression is that using the tongue as a mechanism to treat the body is not going to be either practical or effective.