Reply To: Social media Share button missing
This won’t work out of the box, and is by design. Jetpack hooks sharing options to the end of the ‘the_content’ filter. bbPress doesn’t use this filter, because blog content doesn’t have the same rules as forum content does; they work differently. To make it work, Jetpack’s sharing options would need to hook into `bbp_get_topic_content` and `bbp_get_reply_content` instead.
Someone could write a piggyback function to do this, but it may be more difficult than this first step once you’ve gotten this far. Replies don’t use the same “premalink” logic as topics, forums, pages, and posts do, since they are technically children of topics. There could be other quirks, too.