It's possible that the algorithm that decides what shows up in your news feed has changed. Maybe you haven't been interacting with the types of posts that usually show up as top stories recently. Or, it could be that your friends and pages you follow haven't been posting much of that kind of content.
There could be a few reasons. Maybe you unfollowed or blocked some sources of stories by accident. Or, FB's algorithm might not be showing you the ones it thinks you're not interested in. You can try adjusting your interests in the settings.
Maybe it's a glitch in the FB system. Sometimes these things happen and they usually fix it soon.
Maybe there's a glitch or a loading issue. Try refreshing the page or checking your internet connection.
There are several reasons. Maybe your account settings are incorrect, or the feed has been temporarily disabled. You could also try logging out and back in to see if that helps.
Maybe there's a problem with your internet connection. Check if it's stable.
The stories in your news feed are likely determined by a combination of factors. It could be your preferences you set earlier, your social connections' activities, or even just random selections to show you a variety of content.
Maybe there's a glitch in the system. Sometimes Facebook has technical issues that prevent you from seeing the story viewers.
Maybe it's a glitch in the system. Sometimes, Facebook's interface can have temporary issues that prevent you from seeing your viewers.
It could be because Facebook has certain privacy settings in place that prevent you from seeing this information. Maybe it's to protect the privacy of the viewers.
It could be that the algorithm of your news feed prioritizes newer content to keep it fresh and relevant. Older stories might get pushed down or not shown at all. Also, some platforms have a limit on the number of stories displayed, and older ones might fall outside that range.