Timeline events (such as scheduled publishing) are not displayed for Content Types other than Landing Page.

Steps to reproduce:
1. Login as Admin
2. Go to Content -> Content Structure
3. Create new Folder named "TestFolder"
4. Edit the created Folder
5. Schedule publishing a new version in the future
6. Preview the folder in Page Builder.
7.Expand the timeline

Expected:
Future publication is visible as an upcoming event

Actual:
There are no future events