Change direction of mat-tree UI line border bottom issue design angular

mat tree changes direction from right to left. The bottom border needs to be removed refer to the Image
https://stackblitz.com/edit/material-tree-nested-sndfhl?file=app%2Fapp.component.css

>Solution :

When you open your tree items than your current css effecting, Please add below scss in styles.scss

mat-nested-tree-node{
  &[aria-expanded="true"]{
   & > li {
          border-bottom: none;
      }
  }
}

or simply add below css in your component’s .css file

mat-nested-tree-node[aria-expanded="true"] > li {
  border-bottom: none;
}