Sonar is integrated into the keyword research function of Sellics, which can be found in two areas:
Option 1: Rankings > Keywords
Option 2: Cockpit > Details Page > Keywords
ASIN Reverse Search directly on Details Pages
If the respective ASIN is already part of Sonar's database, the reverse search will automatically take place in the first step of the keyword research process:
In order to check ASINs of competitor products you would currently need to continue using sonar-tool.com.