On Drupal 8.3, I enabled the Content Moderation and Workflow modules.
This provides an example Editorial Workflow by default.
Once your moderation workflows are established, you can apply the workflows to different entity types. Out of the box Content Moderation can be added to Block Content and Content (Node) entities. The "select" button will allow you to select which types should use this workflow.
However, there is no "select" link on the workflow edit page. The screenshot on the documentation page shows This workflow applies to, but out of the box that information is not displayed.
Where can I select which types of entities a workflow applies to?