Search Entities when using Domain Access

Example 1 : Without changing user session.

$query = \Drupal::entityQuery('node');

$query->condition(DOMAIN_ACCESS_FIELD, 'domain_id'); // Set the domain id hear

$query->condition('type', 'article');

$query->condition('status', 1);

$nids = $query->execute();

print_r($nids);

If you can't get all domains data, do as the Example 2.

Example 2 : Using admin user session.

// Call the account switcher service

$accountSwitcher = \Drupal::service('account_switcher');

// Switch to the admin user

$accountSwitcher->switchTo(new \Drupal\Core\Session\UserSession(['uid' => 1]));

$query = \Drupal::entityQuery('node');

$query->condition(DOMAIN_ACCESS_FIELD, 'domain_id'); // Set the domain id hear

$query->condition('type', 'article');

$query->condition('status', 1);

$nids = $query->execute();

print_r($nids);

// Switch back to old session.

$accountSwitcher->switchBack();