From Microsoft Corporation:
“We are introducing a way for SharePoint editors to easily access the version history of a page.
•We’ll be gradually rolling this out to Targeted Release customers in late December 2019.
•The roll out will be complete by the beginning of January 2020.
This message is associated with Microsoft 365 Roadmap ID 57813.
How does this affect me?
This feature will allow page editors to access the version history of a page either through page details or on the command bar.
Editors will also have the option to
•See differences between the current and previous version highlighted on the canvas
•Delete older versions
•Restore older versions.
What do I need to do to prepare for this change?
There is no action you need to take to prepare for this change, but you might consider updating your user training and notifying your help desk.