Where are the facet blocks for search? In drupal 8, I have added couple of facets at this page /admin/config/search/facets

According to the documentation I should now have some blocks to put on the search page.  But I do not see any blocks that represent those facets on the Admin block page(admin/structure/block)

the block for the faceted search does not show up when I look for it in place block modal dialog.

What step am I missing?
The block is already created; you just need to place it following these steps: 


Go to Structure > Block layout
Click on _Place block; you will get the list of available blocks
Search for the facet block and click on Place block