Animal Crossing: Pocket Camp is supported on the following devices:
• Devices running iOS 13.0 or newer
(While it is possible to install on devices running iOS version 11 or newer, the app may not function properly on devices that cannot be updated to iOS version 13 or newer.)
Note: For more information regarding your specific device, please see the manufacturer's official website.
It may take some time before Animal Crossing: Pocket Camp is supported on the newest version of iOS.