A simple query example for drupal 8 and 9.
use \Drupal\node\Entity\Node;
// EntityQuery articles
$nids = \Drupal::entityQuery('node')
->condition('status', 1)
->condition('type', 'article')
->sort('created', 'DESC');
->execute();
$nodes = Node::loadMultiple($nids);
// Loop over your node objects here
foreach($nodes as $node) {
$title = $node->getTitle();
}