Welcome 
Touchscreen
From Arch Wiki Microsoft Surface – wiki.archlinux.de
Note: Since kernel version 5.5 the mutlitouch does not work anymore. The only solution is to get the LTS packages. The LTS packages have basically the same name as the previous packages,
but they always have the suffix -lts at the end, e.g. linux-headers-surface-lts
To use the touchscreen, you need to install the following packages:
libwacom
libwacom-surfaceAUR
Attention: The package libwacom should be installed first, because libwacom-surfaceAUR only contains patches for libwacom! libwacom, is therefore only changed!
Now you only have to reboot and then you should be able to use the touchscreen.
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