Hey @ashkan!
Here are our official docs on referencing the new List View child components:
https://docs.retool.com/apps/web/guides/components/list-view#reference-child-components
And here is a forum thread with some helpful and creative workarounds from fellow users:
https://community.retool.com/t/listview-modify-values-and-save/31733
And looking forward, we're working on a better solution for this 
coming soon.
Let me know if the above help at all, or if you still have any questions!