If you are unable to see posts for your Facebook Page after adding it to Measure.Studio, it's possible the Page has been unpublished.
In order for us to display posts and show data, Facebook Pages must be published.
Confirm if your Facebook Page is published:
Log into Facebook.com and go to the Facebook Page.
From there, click Settings > General. You should now be able to see the Page Visibility settings.
If the Facebook Page is currently unpublished and you would like to add it to Measure.Studio, publish the Page and try adding it again.