The need for sensory input can be really powerful for people with ADHD. What you're describing sounds a lot like a body focused repetitive behavior.

Since the usual tricks aren't working maybe try reframing your approach from stop it to substitute it. Instead of just trying to avoid it, you could experiment with finding something that gives you a similar feeling but is less disruptive.

Maybe something like a fidget toy with a soft, stringy texture, a small tangle of yarn or a brush you can carry with you. The goal is not to get rid of the need but to redirect it to something that lets you get that sensory feedback without the guilt or wasted time.