Likely not as a PSP ISO, but there is hope. Bandai Namco released Naruto x Boruto: Ultimate Ninja Storm Connections on Nintendo Switch (which uses ARM architecture, like phones).
If you want a true "Storm 5," you have two options: Naruto Shippuden Ultimate Ninja Storm 5 Ppsspp Iso File
You need the PPSSPP app (Gold or Free version). Likely not as a PSP ISO, but there is hope
Verdict: You will never find an official Naruto Shippuden Ultimate Ninja Storm 5 ISO for PPSSPP. However, you can play the next best things. Likely not as a PSP ISO