Missing H265 Hardware Acceleration in Big Sur

Hi all,

I'm trying to fix an issue with H265 Hardware Acceleration in Big Sur with one of my builds:
- ASUS Prime H310I-PLUS R2.0
- Intel Core i3 8100
- iGPU Intel UHD 630
- SSD NVME 1TB
- 16GB DDR4

The exact same configuration boot in Catalina with a perfectly working H265 Hardware Acceleration, while in Big Sur such doesn't work.
H264 Hardware Acceleration works fine both in Catalina and Big Sur.

Can anyone help unlock it?
I add to this thread my DSDT dump, OpenCore Configuration, IOReg...

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