$types = Drupal::entityTypeManager()
  ->getStorage('node_type')
  ->loadMultiple();

$node_types = DrupalnodeEntityNodeType::loadMultiple();
// If you need to display them in a drop down:
$options = [];
foreach ($node_types as $node_type) {
  $options[$node_type->id()] = $node_type->label();
}