For myself(being on the Steam Deck), I had to go into the games save folder and copy the save from the 1-14 over to the 1-3 empty game saves folder. I had 2 specific saves from the end of ch 14 that i copied over. Then just booted up the ch 1-3, and those save files were there to load and continue from. This should also be easily doable on Android, you just have to find the games folder/files.