Using Gradle wrapper (./gradlew.sh) with subprojects

You should just have the wrapper task outside of the allprojects block so you only have one gradlew.bat, gradlew.sh, and gradle/wrapper/gradle-wrapper.jar at the top level of your project structure.

You can run the ./gradlew tasks --all to verify the wrapper can see the subproject tasks

Or you can run the ./gradlew <subproject_name>:tasks command to view just one subproject's tasks.