Only network admins can enable this post and comment history.
Click the gear icon from the right menu.
Select Settings from the dropdown.
Click General under Policies.
Go to Who can view the post and comment history? and select your preferred option:
Network admin only: Only network admins can view the history.
Network admin and author only: Network admins and the author can view the history.
Everyone: All network members with access to the post or comment can view the history.
Open an edited post.
Click (Edited) next to the time.
The Edit post history pop-up will appear. It lists every version of the post with the timestamp.
Open the post that contains an edited comment.
Click (Edited) next to Reply below the comment.
The Edit comment history pop-up will appear. It lists every version of the comment with the timestamp.
the previous versions are read-only, so you can’t edit them or restore a comment to an earlier version.