Extra field example for drupal 8/9

my_module.php

<?php


/**
 * Implements hook_entity_extra_field_info().
 */
function MYMODULE_entity_extra_field_info() {
  $extra = [];

  foreach (NodeType::loadMultiple() as $bundle) {
    $extra['node'][$bundle->Id()]['display']['extra_field_on_every_node_bundle'] = [
      'label' => t('Extra field on every node bundle'),
      'description' => t('bla bla'),
      'weight' => 100,
      'visible' => FALSE,
    ];
  }

  $extra['node']['MY_BUNDLE']['display']['extra_field_on_single_node_bundle'] = [
    'label' => t('Extra field on a single node bundle'),
    'description' => t('blabla'),
    'weight' => 100,
    'visible' => FALSE,
  ];
  
  return $extra;
}

/**
 * Implements hook_ENTITY_TYPE_view().
 */
function MYMODULE_node_view(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display, $view_mode) {
  if ($display->getComponent('extra_field_on_every_node_bundle')) {
    $build['extra_field_on_every_node_bundle'] = [
      '#type' => 'view',
      '#name' => 'my_view',
      '#display_id' => 'page_1',
      '#arguments' => [$arg1, $arg2]
    ];
  }
   if ($display->getComponent('extra_field_on_single_node_bundle')) {
    $build['extra_field_on_single_node_bundle'] = [
      '#markup' => Markup::create('Foo <strong>Bar</strong>'),
    ];
  }
}

Salut opi ;-)
c'est pas :
'#display' => 'page_1'
mais :
'#display_id' => 'page_1'

tu peux aussi ajouter :
'#arguments' => [....]
ça peu servir.

Il faut aussi ajouter :

use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\Display\EntityViewDisplayInterface;

ou utiliser :
function nxt_commun_node_view(array &$build, \Drupal\Core\Entity\EntityInterface $entity, \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display, $view_mode) {