How to display expander with Gridview in the wpf

code that demonstrates how to create a TreeView with expandable items

LineStatuses is the collection of line statuses, and each status has a Name property and a Details property, which is a collection of strings representing its details. The HierarchicalDataTemplate is used to define the template for each item in the tree, and the TreeView control automatically generates the expanders for each item.

To display a list of items with expandable details, you can use the TreeView control in WPF. The TreeView control allows you to display hierarchical data in a tree-like structure, where each item can be expanded or collapsed to show or hide its child items. To implement this in your application, you can create a TreeView control and bind it to a collection of items that represent your line statuses. Each item in the collection should have a property that represents its details, which will be displayed in the expander when the item is expanded.

i tried also not able achive as expecting task

This might be helpful for you:

https://www.c-sharpcorner.com/UploadFile/mahesh/using-xaml-expander-in-wpf/