My progress on one of my games did not transfer over to new ipad
The game is MonopolyGO and I have an 9th generation iPad
iPad, iPadOS 16
If playing as a guest, your progress will be lost. If you did have it connected to an Apple account, then this support article describes the procedures to get it back.
https://scopely.helpshift.com/hc/en/40-monopoly-go/faq/6714-i-lost-my-game-progress/