On the timeline you would like to add handles to confirm any shots you don't want are deleted, then go to "Timeline > Clean Up Video Tracks > Flatten Unused Clips".
On the edit page go to "Workspace > Scripts > Handles TL Builder"
Select a timeline, timeline name, and how many handles to use then click "Build Timeline"
Once a timeline is built, if there are errors there will be a new pop up!
In the error pop up will be a list of timecodes where a copy error has occurred. These can be added as markers to the original timeline so each error can be double checked by selecting a marker color, name, and clicking "Yes!"