Third level of menu entries

[clabnet]

Hi,
I would show a menu with three levels : Catalogs > Factory > Stand
I have this code :

const routeName = 'catalogs';

const routes: Array<RouteRecordRaw> = [
  {
    path: '',
    name: routeName,
    component: Layout,
    redirect: `${routeName}`,
    meta: {
      sort: 80,
    },
    children: [
      {
        path: 'catalogs',
        name: `${routeName}_catalog`,
        component: ParentLayout,
        meta: {
          title: 'Catalogs',
        },
        children: [{
          path: 'factory',
          name: `${routeName}_catalog_factory`,
          component: ParentLayout,
          meta: {
            title: 'Factory',
          },
          children: [{
            path: 'stand',
            name: `${routeName}_catalog_factory_stand`,
            component: IFrame,
            meta: {
              title: 'Stand',
              frameSrc: 'http://mysite.com',
            },
          }],
        }]
      }]
  },
];

On the top Breadcrumb I show correctly 3 levels : Catalogs / Factory / Stand,

But on the left side I can see only 2 menu entries : Catalogs and Stand.

Please can you show me where I wrong ?

I'm crazying with menu nesting levels. Thanks in advance,

[jekip]

You can try alwaysShow set to false
This is because there is only one submenu at the last level of the menu, and the program automatically removes the hierarchy