Because the PSP console was discontinued years before MK11 came out, there is for MK11. If a website claims to offer an "MK11 PPSSPP ISO," they are almost certainly:
. These fan-made versions use high-compression techniques to pack updated textures and character skins into a format playable on mobile devices via the PPSSPP emulator. The Story of Mortal Kombat 11 Mortal Kombat 11 Ppsspp Iso File Download Highly
The search for is a dead end. No amount of searching, zip file extraction, or emulator tweaking will create a PSP port of a PlayStation 4/Xbox One game. Instead of falling for clickbait, you have three clear paths forward: Because the PSP console was discontinued years before