Automation in mobile games. How to implement?

Question

Android

It just so happened that I started to play one online MMO game on android. I've been playing for a long time, I already know a lot of things, I'm normally pumped. Yes, one thought hit me in the head:
The fact is that in this game there is no notification that an army is going to attack your kingdom. It does not come either in the game itself or outside of it. I'm thinking, is it possible to make a bot / application / script that would run in the background along with the game, and when attacked, it would send you a signal to the device?
I understand that in order to implement this, you need to know what variables the attack function uses in order to bind it to other code.
Or, as the easiest option, in my opinion, is to make the script monitor the screen in the game every 10-15 minutes and when a red window appears about an attack, it immediately notifies me about it. In the game itself, a round sticker appears in the corner, where it is written how long the enemy army will arrive.
If you have any information on these things, please write.