Did you find a suspicious "pcsx4" repository on GitHub? Report it to GitHub Trust & Safety. Have questions about legitimate emulation? Visit the Emulation General Wiki or the /r/emulation subreddit.
I couldn’t find any official or functional GitHub repository. The name “PCSX4” has been used in the past for fake or scam PlayStation 4 emulators — there is no working, open-source PS4 emulator with that name. pcsx4 github link