Missing tabs under Sound Settings for refurbished Latitude 3420

Greetings. 

I need to disable all speaker enhancements and mic AGC on a recently purchased refurbished Latitude 3420 with Windows 11 for a specific app.  I am unable to do so because the Enhancements tab (for playback) and Custom tab (for recording) under Sound Settings are missing. 

I went to Device Manager and cannot find any High Definition Audio device under Sound, video and game controllers.  What I have is the Realtek(R) Audio.  I tried to update the driver to Realtek (R) High Definition Audio (browse my computer for drivers > pick from list of available drivers on my computer > show compatible hardware) but High Definition Audio Device was not an option. 

I then went to the Official Dell Tech Support website and download the latest version of Realtek High Definition Audio Driver (25-Feb-2025 release date) and installed on the laptop.  Went thru two restarts as called for and the problem persisted. 

Next I started a session with Virtual Assistant and after explaining the problem, was advised that for $99, the laptop may be serviced (since no longer under warranty for refurbished device) by reformatting the hard drive.  If this is indeed the only solution, I can certainly reformat the hard drive personally. 

My question is whether there is something else I should check on, remove, install, etc. before I go that route.