I develop on Linux. In Compose Desktop, when I use the touch pad with two fingers, it produces a "Scroll" event. I get the same behavior when I use the mouse wheel. The delta values of x and y vary between -1 and 1. On the Web browser, the behavior is different. The delta values correspond to the distance traveled on the touchpad, which is much more precise but also generates many more events. Also, it doesn't seem possible to scroll horizontally, even when using the shift key.
I'd like to see the scroll event behavior standardized between Compose Desktop and JS. I'd also like to have precise scroll movement on Desktop too. It's something that would be very useful to me. What do you think?