WordPress Backend Titel in linker Adminleiste

<?php 

function add_custom_admin_menu_titles() {
    global $menu;

    // Define multiple titles with the custom class "title-separator"
    $custom_titles = array(
        array(
            '',                // No link
            'read',            // Capability required (e.g., 'manage_options')
            'separator-1',     // Slug (just a unique identifier, won't be used)
            'First Title',     // The title to display
            '',                // Icon (none needed here)
            'title-separator'  // Custom CSS class
        ),
        array(
            '',                // No link
            'read',            // Capability required (e.g., 'manage_options')
            'separator-2',     // Slug (just a unique identifier, won't be used)
            'Second Title',    // The title to display
            '',                // Icon (none needed here)
            'title-separator'  // Custom CSS class
        ),
        array(
            '',                // No link
            'read',            // Capability required (e.g., 'manage_options')
            'separator-3',     // Slug (just a unique identifier, won't be used)
            'Third Title',     // The title to display
            '',                // Icon (none needed here)
            'title-separator'  // Custom CSS class
        ),
        array(
            '',                // No link
            'read',            // Capability required (e.g., 'manage_options')
            'separator-4',     // Slug (just a unique identifier, won't be used)
            'Fourth Title',     // The title to display
            '',                // Icon (none needed here)
            'title-separator'  // Custom CSS class
        ),
        array(
            '',                // No link
            'read',            // Capability required (e.g., 'manage_options')
            'separator-5',     // Slug (just a unique identifier, won't be used)
            'Fifth Title',     // The title to display
            '',                // Icon (none needed here)
            'title-separator'  // Custom CSS class
        ),
        array(
            '',                // No link
            'read',            // Capability required (e.g., 'manage_options')
            'separator-6',     // Slug (just a unique identifier, won't be used)
            'Sixt Title',     // The title to display
            '',                // Icon (none needed here)
            'title-separator'  // Custom CSS class
        )
    );

    // Insert each title as its own menu item
    foreach ($custom_titles as $index => $title) {
        // Use `add_menu_page` for each title, to add them as top-level menu items
        add_menu_page(
            $title[3],         // Page title (won't be used, no link)
            $title[3],         // Menu title (what's shown in the sidebar)
            $title[1],         // Capability required
            $title[2],         // Slug (unique identifier, but no link)
            '',                // No function callback (no link)
            '',                // No icon
            2 + $index         // Position in the menu (adjust as necessary)
        );
    }
}

add_action('admin_menu', 'add_custom_admin_menu_titles');

.toplevel_page_separator-1 .wp-menu-name,
.toplevel_page_separator-2 .wp-menu-name,
.toplevel_page_separator-3 .wp-menu-name,
.toplevel_page_separator-4 .wp-menu-name,
.toplevel_page_separator-5 .wp-menu-name,
.toplevel_page_separator-6 .wp-menu-name {
    padding-left: 11px !important;
    font-weight: 600 !important;
    font-size: 1rem !important;
}

.toplevel_page_separator-1 .wp-menu-name::after,
.toplevel_page_separator-2 .wp-menu-name::after,
.toplevel_page_separator-3 .wp-menu-name::after,
.toplevel_page_separator-4 .wp-menu-name::after,
.toplevel_page_separator-5 .wp-menu-name::after,
.toplevel_page_separator-6 .wp-menu-name::after  {
    content: "";
    position: absolute;
    bottom: 4px; 
    left: 10px;
    width: 80%; 
    height: 1px; 
    background-color: white;
}

.toplevel_page_separator-1,
.toplevel_page_separator-2,
.toplevel_page_separator-3,
.toplevel_page_separator-4,
.toplevel_page_separator-5,
.toplevel_page_separator-6 {
    pointer-events: none !important;
}
.toplevel_page_separator-1 div.wp-menu-image,
.toplevel_page_separator-2 div.wp-menu-image,
.toplevel_page_separator-3 div.wp-menu-image,
.toplevel_page_separator-4 div.wp-menu-image,
.toplevel_page_separator-5 div.wp-menu-image,
.toplevel_page_separator-6 div.wp-menu-image   {
    display: none !important;
}