controller

$node = $this->entityTypeManager()->getStorage('node')->load($nid);
if ($node) {
 $form = $this->entityTypeManager()->getFormObject('node', 'default')->setEntity($node);
 return $this->formBuilder()->getForm($form);
}

$node = $this->entityTypeManager()->getStorage('node')->create(['type' => 'bio']);
return $this->entityFormBuilder()->getForm($node);

Add this code to route

options:
  no_cache: TRUE

use Drupal\Core\Pager\PagerManagerInterface;

/**
 * Pager Manager.
 */
protected PagerManagerInterface $pagerManager;

/**
 * Constructs a Controller.
 *
 * @param \Drupal\Core\Pager\PagerManagerInterface $pager_manager
 *   Pager Manager.
 */

$page = Page::load('page_name');
if ($page) {
 $variants = $page->getVariants();
 $pageVariant = end($variants);
 if ($pageVariant) {
   $viewer = new PageVariantViewBuilder();
   if ($viewer) {
     return $viewer->view($pageVariant);
   }
 }
}