Drupal 10: Programmatically Render A Node Using A Render Mode

$nid = 123;
$entityType = 'node';
$viewMode = 'default';

$storage = \Drupal::entityTypeManager()->getStorage($entityType);
$node = $storage->load($nid);
$viewBuilder = \Drupal::entityTypeManager()->getViewBuilder($entityType);
$build = $viewBuilder->view($node, $viewMode);