listen to widget option get selected object from list view or data grid to show its details so by default if you dont select any object from data grid or list view it wont have any object to show its details so it will hide if you select object from the data grid or list view it will have an object to show its details so it will show without the need to click any details button
if you want to use action button to show details you can make the action button call a microflow to open a popup page contain the details of object you pass to the page