Good thing that there is such thing like Joiplay to help you, right?......
If I remember correctly (didnt played DA android version for a long time), you can find folder with saves in Android/data directory. If you do not have access to it because of Android 11+ just download ZArchiver, this app can be used as simple file manager and it have full access to that directory. Find the folder of Deviant Anomalies and move the folder "saves" into the folder with Windows version of game.
Hmm... You mean the app that hides virtual space behind the calculator with password? Honestly, Im not sure. Everything depands on the app you are using, there are many such "calculators". The only thing I can say that all virtual space apps like this still store files somewhere. Usualy it is in that same dirrectory (Android/data). Sometimes developers of these apps adding "." in the front of folder name to make it hidden. Also sometimes developers make things more complicated and hide their app data somewhere in root folders and the only way to get access to it will be by "rooting" your device. Actualy at this point it will be much easier to just play the game from the begining than waiting for an android version or trying to "root" recent devices.
P.S. This is why I prefer to always use emulators instead of android ports. This way I always have a free access to all saves (so I can make backup of saves without keeping a game or to cheat freely).