please post more information
sudo dmesg | grep -E 'ALSA|HDA|snd|sound|hda'
I suspect if audio was working on v5.7 kernel, system has a modprobe option added to disable the internal microphone array - options snd-hda-intel dmic_detect=0
if so, data from dmesg will confirm that this option has been deprecated, and advise the new option to use
Like this post from the old forum:
archived.forum.manjaro - Bad audio quality from earphones
replace options snd-hda-intel dmic_detect=0 with options snd-intel-dspcfg.dsp_driver=1
Lenovo YOGA C930 is still awaiting support for internal digital microphone from sof-firmware
Microphone on Lenovo Yoga C930 not working