First beta of Block Admin Tools.
Block Info: a collapsible panel on block content edit and block configure forms showing the block type name and machine name, description, content block ID, placement machine name, region and theme (plugin ID and provider for Views and other plugin blocks).
Block Layout Accordion: collapsible regions on the Block Layout page, with expand/collapse all, an occupied-regions filter and block totals (same code as Block Layout Accordion 1.0.3).
Requires Drupal 11.1+. Tools are shown only to users with the "administer blocks" permission.
