U dont need inject nothing on IGPU device, remove all and use iMac20,1 smbios
or
U can disable IGPU and just use iMacPro1,1 or MacPro7,1 smbios with -wegnoigpu
CPU PM just working nice. In this case just need plugin type =1.
https://easyupload.io/jowvyj
Reset Nvram one more time
Generate USB kext https://www.olarila.com/topic/37827-hackintosh-remap-usb-with-usbtoolbox-windows-or-macos/
Set lan card to 1000 manually