I am configuring the carbon workspace for my client and discovered that I cannot add the Object Explorer itself or other applications than this selection:
You can treat these options as preconfigured “shortcuts” . If you need to link to a Foundry application that is not available here, you can provide the full URL in the “Link to a URL outside of Foundry” option.
Since the “URL outside of Foundry” is misleading, I have opened a request internally proposing this rename: