This is a bit of an ask but...
In order to be able to document the blocks that are used in Full Site Editing in blocks.wp-a2z.org I need to enable Full Site Editing.
To achieve this with Gutenberg 9.2.x the theme needs to support:

• a full-width styled header - with logo, site title, site info and menu
• a body with max-width: 1140px
• a widget area below the body - for search
• a footer area with 3 columns
• a full width bottom footer containing a footer menu