I believe for mouse config in all DEs there are issues with the libinput library and X11 which can somewhat limit config options. If you’re using Wayland then you should find an advanced tab in the mouse options in KDE settings app which may do what you want.
Otherwise imwheel is widely recommended command line tool. There is a comprehensive guide linked below, and the tool can be autostarted in the background once setup.
I’m guessing a fair amount of that haze is air pollution? Looks like a city that will hugely benefit over time from the boom in electric cars, lorries and buses.