To get full value and experience from our Leads Manager module, you need the right set of permission to the given Facebook page.
Page managed without Business Manager
To be able to view collected leads, you need to have Admin role for the managed page.
Page managed in Business Manager
Same goes for Business Manager, where the user needs to have Admin permission, too.
If you are Editor of the page, but still want to be able to handle collected data from Leads campaigns, you need to be added to the user list of Leads Access in Business Manager settings.