If you have a strong internet connection but do not own a high-end gaming rig, you can utilize cloud servers.
Several red flags should give any user pause:
PSP games should be in .ISO or .CSO format. Never run an .APK file that claims to be a console game.
Here is a complete walkthrough for getting any PSP game running on your Android device:
PPSSPP uses PSP game files, typically in ISO or CSO format. Since the emulator does not include any games, you must acquire these files yourself. You can either:
Be wary of sites promising a free ISO of a PS4 game for an Android emulator. These often lead to intrusive ads, surveys, or potentially harmful software. How to Actually Play Days Gone on Android
No. PPSSPP uses High-Level Emulation (HLE) and does not require a PSP BIOS file to run games.