screenshot of Manjaro Settings Manager is showing - Install Linux 5.10.2-2
[Stable Update] 2021-01-19 included kernel 5.10.7-3
You need to update system before installing kernel
sudo pacman -Syyu
Reboot system to load updated packages
And then install kernel:
mhwd-kernel -i linux510
ALSA data looks OK, all input and output jacks appear to be detected and working
suggest you check if PulseAudio is working and detecting audio devices
systemctl --user -l --no-pager status pulseaudio
pacmd list-cards