Open A Menu Item or link in new tab. (Just copy the item/items id and add in this format. Below format is for 2 items)

add_filter('nav_menu_link_attributes', 'open_menu_item_in_new_tab', 10, 3);
function open_menu_item_in_new_tab($atts, $item, $args) {
    // Change 'menu-item-4368' and 'menu-item-4955' to the specific CSS classes of the menu items you want to open in a new tab
    if ($item->ID === 4368 || $item->ID === 4955) {
        $atts['target'] = '_blank'; // Open in a new tab
        $atts['rel'] = 'noopener noreferrer'; // Recommended for security reasons
    }
    return $atts;
}