This report has now moved into the Teams Admin Cente and I have an updated blog post here:
Understanding the Microsoft Teams PSTN Usage Call Records ReportBill for Calling Plan and PSTN Audio Conferencing
Good news, Germany and Belgium PSTN Calling plans for user phone numbers are now out of preview and generally available from Microsoft for Skype for Business Online Phone System (previously called Cloud PBX) from today (1st November). According to the Microsoft Teams Roadmap, these should also be available by the end of the year for Microsoft Teams. That brings us up to 9 counties generally...