ALSA data for kernel v5.4 is showing not showing details for audio device correctly
00:1f.3 Audio device [0403]: Intel Corporation Cannon Point-LP High Definition Audio Controller [8086:9dc8] (rev 30) (prog-if 80)
DeviceName: Onboard - Sound
this system has an 8th generation Intel CPU and probably has an internal digital microphone array (DMIC) that is not supported by kernel v5.4
you need to use kernel v5.8 and install package sof-firmware to get the new driver for the internal DMIC
System also requires a later version of Pulseaudio (v13.99) that includes patches to support the new firmware
the simplest way to get that at the moment is to change to Manjaro testing branch
Problems with audio on laptop - #4 by nikgnomic
sudo pacman-mirrors --api --set-branchand then refresh-mirrors and get updates
sudo pacman-mirrors --fasttrack 5 && sudo pacman -Syyu