There is an out-of-tree driver for the BYD touchpad found in //Librem 13v1// and //Librem 15v2// devices: https://github.com/jayk/psmouse-bydfull-dkms/
Currently it cannot be compiled for latest kernel.
Suggestion is to update and package this, so that users who have the above mentioned hardware can install it easily.
From the author:
> This module provides a significantly enhanced touchpad experience. Tapping is disabled, and two-finger scrolling both vertically and horizontally is enabled by default. The right-click zone is also limited to the bottom-right corner of the pad, rather than the right half of the lower quarter of the pad.