While simplified, it is the official Forza entry for mobile.
Even if Microsoft ported Forza Horizon 4 to Android (which they haven't), your phone would need 6-8GB of RAM and a Snapdragon 855+ chip just to run it at low settings. The PPSSPP emulator is designed for 333MHz PSP games—it cannot decode the complex shaders of a 2018 AAA title. forza horizon 4 ppsspp zip file download for android
Since the game requires hardware much more powerful than a PSP emulator can provide, you should use official streaming or mobile-specific methods: While simplified, it is the official Forza entry for mobile
The original Forza Horizon 4 was never released for the PlayStation Portable (PSP). Therefore, a direct port is impossible. When you see a "Forza Horizon 4 PPSSPP" file, it is usually a (like Test Drive Unlimited or Need for Speed Underground ) designed to look like Forza Horizon 4. Since the game requires hardware much more powerful