The game is installing and running on recent android versions. Just tested with android 14 here. It is necessary to manually click and accept the risks when prompted, the "install anyway" button is somewhat hidden in a drop down menu
That being said, my baby digimon isn't eating it's food. Not sure if it's a android version bug or my own skill issue in learning the game. Will test on the PC later to figure it out
Update: just figured it out, I had to train it so it would be hungry, then it started to eat. All working as intended.