Reading the widget
A badge at the top gives your overall coverage — for example, 5/16 blocks added. Below it, blocks are grouped by the surface they belong to, each with its own count:
Only the groups relevant to your store appear.
Each block within a group is marked Added or Not added. The post-purchase funnels block additionally reports Active or Inactive, since it can be present in your theme but switched off.
Groups that contain more blocks than fit show a Show more link to reveal the rest.