Get menu item of a node
You can try this code:  

use Drupal\menu_link_content\Entity\MenuLinkContent;

$node_id = 1;
$menu_link_manager = \Drupal::service('plugin.manager.menu.link');
$result = $menu_link_manager-&gt;loadLinksByRoute('entity.node.canonical', array('node' =&gt; $node_id));

dpm($result);