Hi @ Dave Foy16. To make the home feed private so that only logged-in members can see it, you need to change the "access" from "public" to "private".
You can make this change from Admin Panel> Settings> Access> Access from public to private. This way, you make sure that no one is able to see any feed from this community, unless they are logged-in. You can learn more here17.
Also, you might find this article20 on how we generate the feed helpful as well.