BuddyPress.org

@prionkor yes, it’s clear now. You would have to add the 2nd sidebar yourself in the files moved over to your active WP theme when you went through the BP Template Pack Process.
Here’s a walk-through example which could give you some clues on what to expect or how to proceed – https://codex.buddypress.org/theme-development/bp-template-pack-walkthrough-level-easy-2/