I find it strange that you’re having issues. I installed Manjaro KDE & Openbox on a Mechrevo S2 Air, which is the same laptop (Tongfang PF4NU1F) as the Tuxedo Pulse 14 Gen1, and it worked out of the box.
Maybe you can search for the Mechrevo S2 Air, and see if there are others who have the same issue as you.