HP G1 800 USDT, 16gb, Haswell Chipset

If anyone has a working EFI for installing Big Sur on an HP G1 800 usdt, would you please share it with me? I have one but have not been able to get the audio working regardless of what I have tried. I think the easiest step for me would be to try someone's working EFI. Thanks! Oh, Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina worked just fine so it is a bit puzzling.

Author: @Trguitar1956