Board Thread:Ask the Staff/@comment-44684570-20191218183704/@comment-35619149-20191219113204

To echo @Sophiedp that sounds like you may have been logged out of game centre. iOS games now store (through Apple Arcade) all your savedata in the cloud. So you can pick up your game where you left off on your iPhone, iPad, Apple TV or whatever.

Try logging out and back in to game centre. If that fails, try a different device. If that fails then yes, defo contact the game studio and see if they can help!