I don't think this has been posted before, but here is some data from SLEEP 2023 supporting what those on Buprenorphine have been saying about it's effectiviness. This is a summary of data collected on 54 patients showing a marked improvement in RLS severity at 12 months on Buprenorphine (Summarised at two sources).
Berkowski J, Wang L, Mehra R. Longitudinal assessment of buprenorphine effectiveness for severe restless legs syndrome and dopaminergic augmentation. Abstract presented at: SLEEP 2023; June 3-7, 2023; Indianapolis, IN. Abstract 0699.