You need a with Custom Firmware (CFW).
While the original PSP hardware is nearly two decades old, the "ISO Club" remains active. It stands as a testament to a generation of gamers who refused to let their hardware become obsolete, choosing instead to "unlock" its full potential through community-driven software and digital archiving. How to Use an ISO File for PSP psp iso club
For those looking for more established or community-vetted sources, several alternatives are frequently recommended by the retro community: You need a with Custom Firmware (CFW)