in version 21.01 of Survey Solutions workspaces were introduced. The settings you are looking for are workspace-specific, as noted in the release notes for that version, Isolation of work into workspaces, bullet 11:
11. Administrator configures each workspace settings separately (logo, global message, export password, email providers, etc).
I have updated the admin settings article you’ve mentioned above to explicitly mention the need to click on a particular workspace name to get access to its settings.
The URL that you’ve mentioned is a compatibility stab, which allows access to the settings of the default workspace (primary) only. It may stop working or work differently in the future.