Backstage is alerting users about "Unauthenticated Domains" with a large prompt in the backend. It adds a link to learn more. On this tutorial page, it shows where to find the "Email Authentication" tab in this screenshot.

However, in our Backstage, that tab is non-existing for both Portal Owners and Portal Admins. Attached is a screenshot.

What is going on? When will Backstage be adding this tab?