What are the sound drivers in Windows 10 on iMac 2020 27'?

Question

Audio

I have been trying to solve the problem of sound quality for a day now.

Previously, there was an iMac 2017 27 ', where the Cirrus Logic 8409 driver was additionally installed without any problems. With it, the sound became voluminous and deep. Installed without problems Realtek High Audio driver 2.82. In the sound settings, even an additional tab appeared.

Now I bought an iMac 2020 27' (MXWV2RU/A). Installed Windows 10 x64 via BootCamp.
I can't install any third-party driver other than Apple Audio Device 6.1.8100.4 so that it will work (when installed, the sound device stops working immediately)




The Apple support forum says that supposedly there should be a Cirrus Logic 4206BCNZ Audio Controller, but a similar driver Cirrus still doesn't work https://discussions.apple.com/thread/251160585?ans...

I tried to download drivers from Realtek, Cirrus and install drivers directly from .inf files.
I tried to download BootCamp drivers https://support.apple.com/en-us/HT204923 to a USB flash drive and install them directly - but, by the way, it was not there folders from vendor Cirrus.
Tried through special third-party driver update programs (such as DriverMax) - they show that the drivers are up to date.

The only thing I could find something similar to Habré in this thread, but it didn't help either:
No sound on Windows 10 via BootCamp?