Description

For non-block themes, the Site Editor is not accessible, but the command palette allows site editor-related commands to be executed. As a result, if you execute a command, you will receive a message indicating that access is not allowed.

Ideally, I think these commands should be disabled for non-block themes.

Step-by-step reproduction instructions

1. Go to Appearance > Themes and activate non block theme (i.e Twenty Twenty)
2. Add new post
3. Open "Command Center" using keyboard short cut. Windows: Ctrl + k / Mac: ⌘ + K
4. Type "Templates" and click on "Open Templates" link. You will be redirected to WordPress page.

Screenshots, screen recording, code snippet

Environment info

No response

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes