Microsoft Teams (free) - Community Post History

I have a Microsoft Teams (free) version (online) in use for a small circle.  I created a community with channels within.  I created some posts, topics, announcements.  Just recently I had a friend who recently joined bring it to my attention that they cannot see any previous posts within the community channels. Only new posts.  Is there a way for new members to see EVERYTHING that has been posted within the community (history)? OR is there a way I can refresh the current posts, will a simple edit or pin then make it visible?