On my PS4 PRO CEH-7116b :
Put bzImage (7 325 Ko), initramfs.cpio.gz (3 986 Ko) you gave me and psxitarch.tar.xz (psxitarch V2) on the root of a FAT32 drive
Plugged into right hand usb port (well reconized), plugged a keyboard on left hand usb port
Disabled HDCP, HDR and HDMI link, set to 1080p...