How to make a dropdown item in wordpress custom menu?

Question

User navigation

Greetings . please tell me who understands. Is in the menu header

$menu =	wp_nav_menu( [
                'theme_location'  => 'menu_1',
                'menu'            => '', 
                'container'       => '', 
                'container_class' => '', 
                'container_id'    => '',
                'menu_class'      => 'nav__menu', 
                'menu_id'         => '',
                'echo'            => false,
                'fallback_cb'     => 'wp_page_menu',
                'before'          => '',
                'after'           => '',
                'link_before'     => '',
                'link_after'      => '',
                'items_wrap'      => '<ul  class="%2$s">%3$s</ul>',
              ] );

I want one menu item to open, in the admin panel I add a sub-item to the item, and it is displayed under the parent. How can I make it drop down. maybe the items_wrap argument needs to be changed, and if so, how?. not found anywhere. Tell me please