Kernel: 5.9.16-1 was marked End Of Life in [Stable Update] 2020-12-30 announcement
I suggest you use Manjaro Settings Manager to install kernel v5.10
manjaro-settings-manager -m msm_kernel
then reboot system and check inxi again
Another user had problems with AMD Raven/Raven2/FireFlight/Renoir Audio Processor audio last year has posted today that kernel update resolved their audio problem