How do I enable the "Ontology" side panel in Code Workspaces?

I want to use Ontology objects in Code Workspaces per this documentation, but I the ‘Ontology’ navigation button did not show up in the side panel in the workspace for some reason. Is there somewhere else in the platform where I need to activate the Ontology SDK?

As of May 2024, this is a Beta feature. You’ll need to work with your Palantir contact to enable it on your instance.