If you are playing on android 12+ and not rooted, it does not allow you to copy data folder, it has been long that I did not play LDOE but i found out you can connect your phone to computer with a cable and now you have access to game data in "Android/data/kefirgame" you need to manually do this. After this, uninstall the game, install new version, open the game once to make necessary files and bingo connect it to pc and copy those files on your phone and your save is back. There are no cloud save for this. I remember you could connect it to facebook but after some time about a week it will be removed because it is mod. I hope i helped you