To add a divider as a menu item in the WordPress admin menu, you can use the following steps:

• Go to your WordPress admin dashboard.
• Navigate to “Appearance” and then “Menus.”
• In the Menu Editor, click on “Custom Links” on the left side.
• Add # as the URL (this is just a placeholder and won’t be used).
• Enter a name for the link, for example, “Divider.”
• Click on the “Add to Menu” button.
• After adding the custom link, it will appear in the menu structure.
• Click on the custom link to reveal additional options.
• In the “Navigation Label” field, enter a non-breaking space:  . This will prevent the label from displaying.
• In the “CSS Classes” field, add a custom class, for example, menu-divider.
• Go to “Appearance” and then “Customize.”
• Select “Additional CSS.”
• Add the following CSS code: