[Q] how to quit participated threads? topic

Hi, i wonder how to quit participated threads. I am using xda premium 4 app for catching forums, and i am usually use participated tab. But there is some unnecessary thread like just wanted to ask is it for my devices. So i am all time seeing this unwanted threads. How can i unfollow them?
You may think its related too app, but it uses pc sites rules. I can see my participated thread on pc site too.

Thank you very much.