When using content moderation, the view_unpblished module does not work. But I really needed to get a user role to see all nodes created of this type and have access to it. With the following snippet, I fixed this. Users of this role can now see and edit nodes of content type 'tools'. In this way, with 10 lines of code we replaced a full module. Not bad!

use Drupal\node\NodeInterface;
use Drupal\Core\Access\AccessResult;

/**
 * Implements hook_node_access().
 * Drupal 8 does not provide a permission of
 * "View all unpublished content of content type X"
 * With this hook, we allow the tools_admin user to view and edit
 * all unpublished content of content type tools
 */
function MYMODULE_node_access(NodeInterface $node, $op, $account) {
  $type = $node->bundle();
  $roles = $account->getRoles();
  if ($type == 'tools') {
    if(in_array('tools_admin', $roles)) {
      return AccessResult::allowed();
    }
  }
}