How to install Realtek drivers

inxi shows snd_hda_intel driver is already in use

  Device-1: Advanced Micro Devices [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP
    Audio driver: snd_hda_intel 

  Device-2: Advanced Micro Devices [AMD] Family 17h/19h HD Audio
    vendor: Biostar Microtech Intl Corp driver: snd_hda_intel 

Driver snd_hda_intel is the standard Linux driver for onboard audio devices that comply with Intel HDA audio standard and works for most audio codecs made by Realtek, including the Realtek ALC897 on this motherboard

Often we get asked to open a new thread

I did not ask you to open another thread and Forum rules do not allow cross-posting

I have a partial draft response to your other topic that may be posted later today,
but It is 7:00 am here and I am only on my first cup of breakfast

Sounds like a proprietary browser thing