D9 Can't change field regions or enable fields in node displays UI (e.g. full, teaser, etc.). Can I enable fields programmatically? - field

Question

I was handed this D9 website and I just trying to enable some fields in node displays (e.g. full, teaser, etc.) and to assign them to regions, but I can't do it. The loading gif goes on forever and when I click submit it goes back to disabled or the original there are a lot of fields on these node displays. This might be a cache problem. I can't figure it out on the backend.
Is there any way I can enable these fields programmatically or in the database?
How do I assign a region to the field in the code below?
/** #var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository **/
$display_repository = \Drupal::service('entity_display.repository');
// Assign widget settings for the default form mode.
$display_repository->getFormDisplay('node', 'node_type')
->setComponent('field_name', [
'region' => 'content',
])
->save();
// Assign display settings for the 'default' and 'full' view modes.
$display_repository->getViewDisplay('node', 'node_type')
->setComponent('field_name', [
'label' => 'hidden',
'region' => 'content',
])
->save();
$display_repository->getViewDisplay('node', 'node_type', 'full')
->setComponent('field_name', [
'label' => 'hidden',
'type' => 'string_textfield',
])
->save();
If the above is the correct code, what function hook can I use to implement this?

Answer 1

The following worked for me:
module/module.routing.yml
module.fields:
path: '/module/fields'
defaults:
_controller: '\Drupal\module\Controller\ModuleController::fields'
_title: 'Enable fields in node after changing field type'
requirements:
_permission: 'access content'
module/src/Controller/ModuleController.php
namespace Drupal\module\Controller;
use Drupal\Core\Controller\ControllerBase;
/**
* Class ModuleController.
** #package Drupal\lotus\Controller
*/ class ModuleController extends ControllerBase
{
/**
* Fields.
* * #return string
* Return Fields string.
*/
public function fields()
{
$display_repository = \Drupal::service('entity_display.repository');
// Assign widget settings for the default form mode.
$display_repository->getFormDisplay('node', 'bundle')
->setComponent('field_name', [
'region' => 'content',
])
->save();
// Assign display settings for the 'default' and 'full' view modes.
$display_repository->getViewDisplay('node', 'bundle')
->setComponent('field_name', [
'region' => 'content',
])
->save();
$display_repository->getViewDisplay('node', 'bundle', 'full')
->setComponent('field_name', [
'region' => 'content',
])
->save();
return ['#type' => 'markup',
'#markup' => $this->t('Field field_name has been enabled!!'),];
}
}