You can download your Motherboard's Audio drivers from here: https://www.gigabyte.com/Motherboard/B550I-AORUS-PRO-AX-rev-10/support#support-dl-driver
The AMD HD AUDIO driver is installed when you install the AMD Driver package for AMD GPU card. I believe the AMD APU IGPU Audio uses the Motherboard's Audio and not the AMD HD Audio driver.
You can go to Window's SOUND PANEL to see which device uses the AMD HD Audio driver. IT should be your GPU card if you have one installed.
Otherwise your should see Realtek HD Audio driver for your Monitor if connected to the Motherboard's Video Output ports.