In this video, you will get a basic understanding of Clothing Attribute Painting. This feature optimizes simulation results and enhances stability by allowing you to simulate only specific parts of the clothing as needed, rather than simulating the entire garment. For instance, when simulating a fitted suit, you can choose to simulate only the non-fitted sections. Clothing Attribute Painting is essentially a feature that supports using brushes in UE to paint clothing mesh skinning strength, blending skinning constraints during solving.
https://dev.epicgames.com/community/learning/tutorials/MpM4/unreal-engine-style3d-simulator-clothing-attribute-painting