The stunning header for a group page was created separately with the page settings. To edit this section, you need to open the page for editing:
Then, you will find a block of options for the stunning header customization:
Here you can disable/enable the stunning header section and customize its content and styles.
If you switch to Yes, the settings will be changed only for this page. If turned off, general settings will be applied.
If you click on the "Change Content" button, you can customize the elements you want to display in the stunning header: title, custom title text, breadcrumbs, or additional information in the "Text" field.
If you click on the "Change Content" button, you can adjust the stunning header height, background color/image, animated background and its type, bottom image, text color.
Note: if you toggle to "No" - general settings will be applied, they are controlled from Customize -> Header Stunning options.