Timeline view has come recently for VS code updates and show history of the file changes but i accidentally click hide or some place and it got hidden. How to bring that back?
This seems to be an bug in VS code and yet to be fixed. If it is not fixed for your version, you can remove the timeline.excludeSources setting from your user settings, and that should restore the view.
To find user settings you can Ctrl + Shift + Q and find Preferences: Open User Settings. There search for timeline and remove the key value.