You can see who the Broadcast was sent to by tapping 'Lists & Chat Groups' on the Tendant home screen, tapping 'Lists' and then tapping the List you sent the Broadcast to. You can then tap 'View List Members' to display the contacts the Broadcast was ...
Tendant does not copy existing contacts to the device, please ensure contacts are copied manually or through the account on your device. Android Contacts > Accounts - Make sure your primary account has been added. iOS Settings > Contacts - Make sure ...
Yes, you can force a manual sync of contacts at any time by tapping People from the home screen, then tapping the (refresh) icon and the system will import any new contacts from your device's native phone book.