said 1 year, 1 month ago:
Posts become visible when people engage with your page/posts. If they’re not visiting your page & engaging (liking, sharing or commenting) with your posts, they likely won’t see them in their feeds.
Your issue is something different. It’s possible that those posts that are missing may be due to the settings for your page.
Under “Edit Page”, look at the “Post Visibility” section on your managed permissions tab, look at the dropdown and make sure it says “allowed on page”.
You can also try using your page as admin, look right below the apps area where it says “Highlights”, click on it and choose “Posts by Others”. * To view posts by others the checkbox needs to be checked on the “Post Visibility” section mentioned above.