Sometimes, Facebook might be undergoing maintenance or updates that temporarily affect the sharing feature. Wait for a while and try again later. Additionally, it could be that the content you're trying to share doesn't comply with their policies.
There could be several reasons. Maybe the platform doesn't support that function for the type of post you're trying to share. Or there might be a setting in your account that restricts sharing to stories. Another possibility is that the post is from a source that doesn't allow sharing in this way.
Could be that there was some sort of violation of terms of use associated with sharing posts to story in 2022. Or maybe it was a server issue on the platform's end that prevented the sharing functionality from working properly.
It could be that your account settings are restricting the sharing option. Check if you have enabled the necessary permissions for sharing posts to the story feature. Also, make sure you're using the latest version of the app.