Currently, using GB 18.2, there's a command to add a new post but then, if you want to generally return to the Site Editor, you can't just type "site editor". Nothing shows up:

This surprised me for being able to quickly get back after creating a post. We have three options:

• Add the ability to enter "Site editor" to return to. This would lay the groundwork perhaps for having the command palette across wp-admin where locations would be more desirable to go to: Command Palette: enable the command palette to be evoked everywhere in WordPress  #58218
• Show the top level items within the Site Editor: Pages, Templates, Styles (which you can search and access).
• Do nothing. We decide the command palette isn't going to take this approach.

I have a feeling the second option might be more palatable:

This makes me wonder if we can improve the empty state of the command palette a bit to show no results found but offer some intelligent suggestions.