Gradle tasks by group

Starting Gradle 5.1, we can query the Gradle to give tasks list by specifying the --group option.

./gradlew tasks --group reporting

The issue is that it only returns tasks for the root project. Is there a way to get the tasks across modules?
I’m trying to speed up with Github action and not query -all tasks assuming it could improve the time.
Please help.

It seems the build times are constant across the two commands. I don’t think this could further be improved. But feel free to suggest.