Keyboard shortcuts modal does not appear in Site Editor

[bobbingwide]

Description

I was trying to refamiliarise myself with Keyboard shortcuts in order to attempt to complete Call 5 - Query quest using keyboard only. Imagine my surprise to discover I couldn't find what the keyboard shortcuts were.

Step-by-step reproduction instructions

1. Open Site Editor
2. Click on "More tools & options"
3. Click on "Keyboard shortcuts"

or, on Windows, press Shift + Alt + H

Expected behaviour

• Keyboard shortcuts modal dialog should appear, like it does in the block editor.
• With some of the shortcuts included
• And some taken out eg
  • Switch between visual editor and code editor
  • Toggle fullscreen mode

Actual behaviour

• No dialog appears.
• No messages in the console.

Note: Some of the keyboard shortcuts, such as Shift + Alt + O to open or close the block list view, do work.

Screenshots or screen recording (optional)

The first part of what I might have expected to see:

Code snippet (optional)

WordPress information

• WordPress version: 5.7.1
• Gutenberg version: 10.4.1
• Are all plugins except Gutenberg deactivated? Yes
• Are you using a default theme (e.g. Twenty Twenty-One)? Yes. TT1 blocks

Device information

• Device: Desktop
• Operating system: Windows 10
• Browser: Chrome - Version 89.0.4389.128 (Official Build) (64-bit)

[mtias]

This is being tracked in #21245. Should be picked up soon.