This is absolutely insane that it takes this much to do something my damn 1920 radio could do with an analog dial.
Actually it is completely sane the way they are doing it.
The simplest explanation is to use the 10 band graphic equalizer as an example:
- Realtek audio driver has 10 band graphic equalizer
- You buy a desktop pc or a laptop with premium sound (built-in Dolby, DTS, Nahimic, Waves, B&O...) and the premium sound app has a 10 band equalizer.
- You forgot you have 2 EQ's and you turned both on accidentally.
- Your sound is ruined because you double EQ'ed.
So to prevent double EQ'ed or double environment (the sewer sound emulation) or double loudness equalization --- that particular realtek "feature" gets deleted and you use the equalizer/environment/loudness equalization in the premium audio app.
For example, if you have a lenovo computer with premium dolby audio app. Then realtek's 10 band EQ and loudness equalization are both deleted. Instead you use Dolby's 10 band EQ and volume leveler (which is their name for loudness equalization).

It's been like that since windows 7 when fireberd figured out that his realtek EQ was deleted and he had to use the EQ in the Soundblaster app.
https://www.sevenforums.com/sound-audio/252007-realtek-hd-audio-equalizer-not-working-properly.html#post2089303
If your premium audio app doesn't have that particular feature and it's also deleted in the realtek audio console, then complained to your computer manufacturer, they are the company that decides what to delete in the realtek audio driver. Nothing to do with realtek or Microsoft.