Yes, if you sideload PPSSPP via AltStore. However, iOS requires the game to be unpacked into the Documents folder. The 100MB size works great for iPhones with 64GB storage.
You want to experience the full story, listen to Radio Los Santos, or enjoy the PS2 graphics. In that case, buy the official $15 remaster for PC/Phone.
If you want a short description or a different tone (e.g., promotional, warning-only, or step-by-step guide), tell me which style and I’ll rewrite it.