Glad to hear you solved the Privacy Policy issue. I'm not sure why you couldn't save that setting through Autotune, but if it's solved, that's the important thing
As for Open Graph tags for Kunena, we don't have a Kunena specific Open Graph plugin. However, JFBConnect should be setting basic tags for title and description for each topic. We'd set those tags based on the standard meta title and description for that page, which Kunena generally sets up properly.
If there's something specific you're looking for in your Open Graph tags within Kunena pages, let us know. We'll gladly help you how we can. A Kunena specific Open Graph plugin isn't something we've investigated simply because the default tags that JFBConnect generates has generally been good enough for our users.
Thanks,
Alex