Dump output in Drupal 8/9
Perhaps due to my curvature or lack of knowledge of the normal settings, I have never been able to get data output to work in Drupal 8/9 twig templates, neither with devel, nor with kint, nor with the twig_vardumper module, which supposedly has the same functionality.
However, the drupal_dump command partially saved the situation, which has a syntax similar to the usual and familiar dvl
{{ drupal_dump(node) }}