jacoco-aggregate give an empty report

Question

I am trying to do a jacoco-aggregate to send it to sonarqube according to this post: https://community.sonarsource.com/t/coverage-test-data-importing-jacoco-coverage-report-in-xml-format/12151

Apparently it is needed to use the xml format aggregated now because SonarQube does not use the exec file anymore according to this warning on SonarQube (But I can't see where it is officially stated besides a forum post and it was working some months ago on my project with exec files)

My pom architecture is like this:

-root
  --child1
  -- common
  -- coverage
  -- etc

My root pom look like this (only the interesting part about jacoco)

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.toto.example</groupId>
    <artifactId>root</artifactId>
    <version>1.0.0</version>
    <packaging>pom</packaging>

    <build>
        <plugins>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <id>prepare-agent</id>
                        <goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

My child1 and common pom look like this

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.toto.example</groupId>
    <artifactId>child1</artifactId>
    <version>1.0.0</version>
    <packaging>jar</packaging>

     <build>
        <plugins>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>${jacoco.version}</version>
                <executions>
                    <!-- need to add this in order for the correct to be passed, and create the jacoco.exec -->
                    <execution>
                        <id>jacoco-initialize</id>
                        <goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

My coverage pom look like this:

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.toto.example</groupId>
    <artifactId>coverage</artifactId>
    <version>1.0.0</version>

<!-- Used to determine which module should be aggregated -->
        <dependencies>
        <dependency>
            <groupId>com.toto.example</groupId>
            <artifactId>child1</artifactId>
            <version1.0.0</version>
        </dependency>
      <dependency>
            <groupId>com.toto.example</groupId>
            <artifactId>common</artifactId>
            <version1.0.0</version>
        </dependency>
      </dependencies>

        <build>
        <plugins>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <id>report-aggregate</id>
                        <phase>verify</phase>
                        <goals>
                            <goal>report-aggregate</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

When I run a mvn clean install I see the following result in folders:

- root
  -- child1
  ----target
  ------jacoco.exec
  --common
  ----target
  ------jacoco.exec
  --coverage
  --- target
  -----site
  -------jacoco-aggregate
  ---------jacoco.xml (The famous file I need to pass to sonarqube)

I do a mvn verify on the root parent and in debug mode I see that I pass in jacoco-aggregate method in the createRepport. However the result is empty and I don't understand why. If I open the index.html in the coverage part, I get the following result:

There is no coverage added and I don't understand why, the jacoco.exec have info in it so I don't understand why it's not aggregated correctly in the jacoco-aggregate. I make sure to be as close as the jacoco-example at: https://github.com/jacoco/jacoco/tree/master/jacoco-maven-plugin.test/it/it-report-aggregate and when I try this test I can see the following result:

But I can't get the same result on my end