Game Volumes

• I can't use the game volumes I purchased.
• [Android] Game volumes are not restored even after tapping Restore Purchase.
• What requires an in-app purchase?
• If I reinstall the app, do I need to purchase the volumes again?
• [iOS] Can I share game volumes via iCloud Family Sharing?
• [Android] Can I share game volumes via a Google family group?
• I was charged for something I don’t recognize.