Can you make the APK by itself please. This is my favorite game and I can't install it
To answer the question: Runey has mentioned that, based on his current knowledge, Ren'py has a size limit of 2 GBs for .apk files. The game, as of update 0.18.2, is ~12 GBs in size. Another method will be required in order to create an .apk file for the game.
I vaguely recall someone suggesting a method, but I could be wrong about that one (it's been awhile). But to reiterate: the .apk file can't be created by itself due to the size of the game.
The only method i find from other dev in itch is to create separate folder for the apk data. Then user install the apk and paste the folder in to android data folder. However, recent android version has limited user access to this folder and it would be hard for user that dont understand much about this.