bbPress.org

really any plugin that has an included insertable template tag will work.

im going to use jetpack sharing as an example .

first i take every instance of each default area jetpack sharing shows.(also jetpack likes)

function jptweak_remove_share() {
    remove_filter( 'the_content', 'sharing_display',19 );
    remove_filter( 'the_excerpt', 'sharing_display',19 );
    if ( class_exists( 'Jetpack_Likes' ) ) {
        remove_filter( 'the_content', array( Jetpack_Likes::init(), 'post_likes' ), 30, 1 );
    }
}
 
add_action( 'loop_start', 'jptweak_remove_share' );

and then i could just display it anywhere on the reply. in loop-single-reply.php

with this

if ( function_exists( 'sharing_display' ) ) {
    sharing_display( '', true );
}

this code also removes it from content like posts and pages. but you can just manually insert it into your wordpress templates to with the above code.