These are not "PPSSPP" files but rather the actual PC version of ETS2 configured to run on Android through PC emulators like Winlator or Mobox. These require high-end devices (Snapdragon 720g or higher) and up to 25GB of storage .
If you download a raw, untested ETS 2 mod for PPSSPP, you will likely encounter game-breaking bugs. The "Fixed" zip files have been modified to address specific emulation issues. Euro Truck Simulator 2 Ppsspp Zip File Fixed Download