1. If you buy the game via Steam, PlayStation, Xbox, or Microsoft Game Pass, it will be available on any device you log in to your corresponding account.
2. If you buy the game via Google Play Store, the full game will be available on any Android device with your Google Play account logged in.
3. If you buy the game via Apple AppStore, the full game will be available on any other Apple device with your Apple ID logged in.
Important!
Unfortunately, there is no cross-progress between different platforms. Also, you need to purchase the game on each platform separately.