It's well known APKs over 2GB won't install on many devices.
Yes, I am fully aware. But I also have made it pretty clear that I don't directly support the android build - I add the apk because renpy has the option to create it. I know very little about androids. What you may need is a compressed version of the game. There are people who make compressed versions of VNs regularly. There is one in the Last Human F95 thread that someone did but itch won't let me send you the link.