Entity Submenu Block

This Drupal 8 module is meant for the fairly common use case of displaying the current page's submenu items as rendered content entities (typically in the 'teaser' or similar view mode).

You can add Entity Submenu Blocks from the Block layout page and configure the view modes that should be used for different content entity types. By default only menu items for content entities are rendered, but there is an option to render other menu items as simple links too.