How do I sync game data between iPads?
How do I save
progress from a game on the cloud so that I can open that game on a different IPAD using same Apple ID and resume the game?
[Re-Titled by Moderator]
iPad Air, iPadOS 18
There isn't a universal answer to your question. How game data is saved is entirely determined by the game; the manner in which game data is saved - and potentially shared between devices (which may not even be possible) - will differ between Apps.
Some Apps save data to private storage on the device alone. Others may use Apple's iCloud storage, or may even use cloud storage provided by the game Developer.
To conclude, you will need to explore how specific game titles store their data. You may find that an App Developer has online help-resources. Otherwise, you might need to contact and seek guidance from the game Developer: