Yes, all saves are compatible between all Operating Systems and devices :) You can find the save folders in the following locations:
WINDOWS:
PC > Local Disk (usually C:) > Users > USERNAME > AppData > Roaming > RenPy > CorruptedKingdoms-1547378918
MAC:
~/Library/RenPy/CorruptedKingdoms
LINUX:
~/. renpy/CorruptedKingdoms/
ANDROID:
Android/data/com.domain.corruptedkingdoms/saves
NOTE: If you're running Android 11+ then Google has hidden your data folder. To access it you need to connect your phone to your PC with a USB cable or use an app like Solid Explorer or X-Plore to give you access to the folder again.