@Paolo,
That is easy to fix.
change cset "name='Headset Mic Boost Volume' 1" to cset "name='Mic Boost Volume' 2" in the all LENOVO_*/LENOVO_*.conf
sudo cp -rf /usr/share/alsa/ucm/LENOVO-MFG_IN_GO-ThinkPad-MFG_IN_GO/ /usr/share/alsa/ucm/LENOVO-20QD00LKIX-ThinkPadX1Carbon7th-20QD00LKIX/
sudo mv /usr/share/alsa/ucm/LENOVO-20QD00LKIX-ThinkPadX1Carbon7th-20QD00LKIX/LENOVO-MFG_IN_GO-ThinkPad-MFG_IN_GO.conf /usr/share/alsa/ucm/LENOVO-20QD00LKIX-ThinkPadX1Carbon7th-20QD00LKIX/LENOVO-20QD00LKIX-ThinkPadX1Carbon7th-20QD00LKIX.conf
reboot
@Paolo,
That is easy to fix.
change cset "name='Headset Mic Boost Volume' 1" to cset "name='Mic Boost Volume' 2" in the all LENOVO_ */LENOVO_ *.conf
sudo cp -rf /usr/share/ alsa/ucm/ LENOVO- MFG_IN_ GO-ThinkPad- MFG_IN_ GO/ /usr/share/ alsa/ucm/ LENOVO- 20QD00LKIX- ThinkPadX1Carbo n7th-20QD00LKIX /
sudo mv /usr/share/ alsa/ucm/ LENOVO- 20QD00LKIX- ThinkPadX1Carbo n7th-20QD00LKIX /LENOVO- MFG_IN_ GO-ThinkPad- MFG_IN_ GO.conf /usr/share/ alsa/ucm/ LENOVO- 20QD00LKIX- ThinkPadX1Carbo n7th-20QD00LKIX /LENOVO- 20QD00LKIX- ThinkPadX1Carbo n7th-20QD00LKIX .conf
reboot