Navigate to Confluence administration → Linchpin → Enterprise News → Configuration → News Hub.
Click on the Additional settings button.
Navigate to the Limit news subscriptions to space categories section.
Enter space categories in the input field.
Spaces will be offered to subscription only if they match the space categories defined here.
If you enter several space categories here, the space will have to contain all defined space categories to be displayed to users.
If you leave this input field empty, all spaces will be offered to subscription.
Link to this page: https://seibert.biz/newshubconfig