The Facebook Public Data API can’t find Pages that are region-specific or for adult consumption (for example, alcohol products). This is because the API can’t define the region or the user’s age.
To see data for region-specific Pages, change their region settings so all users can see the Pages.
Pages marked for adult users can’t be seen with Facebook Public Data. In this case, consider using Facebook Insights if your Page meets the threshold of more than 100 likes that makes it eligible for this tool.