@happty_dog2022
I looked at the Arch wiki for the Xiaomi Notebook Air and it say’s using xf86-input-evdev makes the touchpad act like a touchscreen so you might not want that. So maybe uninstall that and try the xorg file.
xorg file
/etc/X11/xorg.conf.d/20-touchpad.conf
Section "InputClass"
Identifier "libinput touchpad"
Driver "libinput"
MatchIsTouchpad "on"
MatchDevicePath "/dev/input/event*"
Option "Tapping" "on"
Option "ClickMethod" "clickfinger"
Option "NaturalScrolling" "true"
EndSection
https://wiki.archlinux.org/title/Xiaomi_Mi_Notebook_Air_13.3_(2018_Global_version)#Input