edlp_d8/web/modules/custom/edlp_ajax/includes/edlp_ajax.inc

<?php

// use Drupal\Core\Url;

function template_preprocess_edlp_ajax(&$vars){
  // dpm($vars);
/*
  @see https://www.drupal8.ovh/index.php/en/tutoriels/339/render-a-node-or-an-entity
  */
  $view_builder = \Drupal::entityTypeManager()->getViewBuilder($vars['entity_type']);
  $vars['content'] = $view_builder->view($vars['entity'], $vars['view_mode']);

}