How to apply Cloth physics?


Hello, I’m trying to get cloth physics to be applied to a sash on the character’s waist -
But, every tutorial I follow shows them clicking on something called “Section Selection” and I can’t find that option in my software.
I’ve been trying to solve this for a while now, but so far have had no luck, and I’m open to any ideas,
Or maybe if there’s a different way to do cloth physics, I’d be open to try a different approach if you guys think there’s a better way -

Thank you for your time!