Show Entity List Builder in Block base?
render() builds are renderable array for a table:

  public function build() {
    return \Drupal::entityTypeManager()-&gt;getListBuilder('entity_type')-&gt;render();
  }


Reference: https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Entity%21EntityListBuilder.php/function/EntityListBuilder%3A%3Arender/8.5.x