BuddyPress.org

bp_core_new_nav_item()

bp_core_new_nav_item doesn’t need

‘parent_url’ => $bp->displayed_user->domain,
‘parent_slug’ => $bp->profile->slug,

remove those.

create a function to redirect

function my_redirect() {
    if ( 'community' === bp_current_component() ) {
        bp_core_redirect( 'your link here );
    }
}
add_action( 'template_redirect', 'my_redirect' );