Timeline Feature ain’t running or windows timeline just shows current tasks and can’t track previous activities.
it’s possible for you to read more about the Windows timeline feature and how it works fromhere.
Note: If you are facing sync issue simply click onClearbutton togetrefreshed.
And fix most of windows timeline feature related issues.
Some Other solutions you may try:
Open theSettings app, go toSystem>Shared Experiences.
Here toggle onShare across devices and setI can share or receive fromtoEveryone nearbyas shown image below.
Still need help lets tweak the Windows registry.
Press Windows + R, typeregeditand ok to kick off the Windows registry editor.
First backup the registry database then navigate to the following key.
Thats all now restart Windows and check the Windows timeline working properly and started collecting your previous tasks.