Do the following steps to activate auto copy search from widget.
1. Pull down (from top of your screen) to reveal the widget.
3. Enable it by pressing on the +(plus) next to Truecaller
Inbuilt call log search:
1. Find a number you want to search from your call log. Tap on ( i ) icon next to a number you want to search. Now tap -
2. Three-dot menu
3. Add Truecaller.
4. Truecaller will now be added to in that list to make quick searches