pubmed.ncbi.nlm.nih.gov/378...
An interesting study on Vagus Nerve Stumulation on 15 drug resistant RLS patients showed significant improvements in quality of life scale and that 2 of the 15 reduced their IRLSS below 5.
The study doesn't say what meds the patients were taking.
Sadly, they don't show or explain the method of Vagus Nerve Stimulation, but it seems to involve the ears.
I found this article which seems to involve an electrical device to stimulate the auricular vagus nerve.
frontiersin.org/articles/10...
Hopefully, someone will start manufacturing a specific device for home use.