I’ve been having the same problem for some time. Yesterday, I reset my BIOS to “ BIOS Defaults” and everything seems to be back, working as intended!!
My ‘Realtek Microphone Array’ disappeared some time ago. After trying various downloads as mentioned on this thread my Realtek Audio Speakers disappeared as well!!
I decided to try resetting BIOS and within a few minutes all my Audio settings were back working properly.