Iterar os campos de um formulario form_state do drupal

drupal_form_state_fields.php

<?php

$node = $form_state->getFormObject()->getEntity();
$all_fields = [];
foreach ($node->getFields() as $field_name => $field_item_list) {
  $all_fields[$field_name] = $field_item_list->getValue();
}

// Use $all_fields conforme necessário
echo '<pre>';
print_r($all_fields);
echo '</pre>';
exit;