While the original .rar file mentioned is often shared via community forums, you can find similar and more recent updates from these reputable sources:
: Sites like Reddit's r/WEPES host overviews of available files and troubleshooting tips. Installation Steps for PS4 & PS5 Download New Option File Juin 2022 Pes 2021 PS4 PS5 Part rar
Installing these files requires a computer and a USB drive (formatted to FAT32): While the original