On Linux, the libinput driver, unlike the now legacy Synaptics driver, does not by itself implement kinetic/inertial scrolling, as mentioned here: https://wayland.freedesktop.org/libinput/doc/latest/faqs.html#kinetic-scrolling-does-not-work This means that it's basically up to the application to implement it instead, and having it present in all LibreOffice components would be a nice QoL improvement for touchpad and touchscreen users.
This would be an extremely helpful change. In addition to kinetic scrolling, it would also be great to have pinch zoom gestures on Wayland and on X11 (once the Xinput2 changes have been merged which make it possible to get touch events directly from libinput).
Friendly bump, in case there is interest in implementing this particular feature.