I’ve seen suggestions of a link between ADHD and restless leg syndrome in the past, but that was many years ago. Checking Wikipedia’s RLS page now it states up to 44% of people with ADHD also have RLS.
I did have issues with it as a child, but was able to get it under control in early adulthood. Although around the same period I also started on Stratters and anti-anxiety medications - so maybe that helped sort it out.
I noticed it says placebos to be very effective, maybe you can get some of those OTC 😆
Two things you can try is disabling USB selective suspend. The same section of power options has an option for Turn off hard disks after…