add "+Add content" button to a view page

 function MY_MODULE_NAME_menu_local_actions_alter(&$local_actions)

{

    // Alter local actions if needed

    // Check current route

    $current_route = \Drupal::routeMatch()->getRouteName();

    $viewId = 'contentcontent';

    $viewDisplay = 'page_1';

    if (str_starts_with($current_route, 'view.contentcontent')) {

       

        // Add a local action button to add new content

        $local_actions['node.add_page'] = [

            'title' => "add",

            'route_name' => 'node.add',

            'route_parameters' => [

                'node_type' => 'article'

            ],

            'appears_on' => [

                'view.'.$viewId.'.'.$viewDisplay,

            ],

            'class' => 'Drupal\Core\Menu\LocalActionDefault',

            'weight' => 10,

            'options' => [],

        ];

       

       

    }

}