BuddyPress.org

My problem similar
https://buddypress.org/community/groups/how-to-and-troubleshooting/forum/topic/bbpress-global-forum-and-buddypress/
https://bbpress.org/forums/topic/bbpress-20-forums-page-within-buddypress

they advise
“well they don’t work well together so you need to hack it together”
“All I had to do was add [bbp-forum-index] in the proper page and there you have it.”

But what it is? where add the code? On what page? in what place?
sorry for my stupid questions.