I found the solution –
The maven plugin I have included has configuration of Jacoco’s destfile and datafile as ${basedir}/target/coverage-reports/jacoco-unit.exec
but by default sonar reads at ${basedir}/target/jacoco.exec. I changed the default at http://localhost:9000/settings?category=java
Ref: Sonar Code Coverage
Couldn’t find the working reference link. Here is aux link: Baeldung Sonar and jacoco