Display Port is not working too. The time i add the (0x1F,0x3) entry with your settings all sound -> output choices will disappear - no more audio out for the Hackintosh. Same as with HDMI.
Again the question before i try things that do not work at this time (i can use analog audio out, but HDMI embedded would be far better):
I am on Monterey 12.1 - Do you know if HDMI or DisplayPort embedded audio output works for a known user with Intel iGPU-out and Monterey?
If yes:
I did create my EFI with OC gen-X 3.27 which is for OC 0.7.6. I can see some differences to your demo Z490 Vision Intel iGPU-out OC-0.7.6 EFI config.plist. I saw your UEFI -> audio section with (0x1F,0x3), i had (0x1B,0x0). I did change there to your settings too. Tried it, but no better effect - same as before: all outputs disappear.
So should i change to OpenCore Configurator 0.7.6 and create EFI with this tool and compare to your config.plist?
What entry parts of your config.plist must be same for HDMI or DisplayPort embedded audio out?
So i can check that and do not use extra stuff from your config.plist that i do not need or which makes other problems. For example: i think i saw bluetooth, 2.5 GB Intel Ethernet and other special stuff that i will not need.