Often you can middle-click-drag to scroll. That is click the scrollwheel down like a button, hold, and you should get a scroll icon appear; move the mouse up or down (sometimes left-right as well) and it will scroll.
Some mice (Microsoft ones IME) have horribly clunky middle-click, at least the Logitech mice I normally use are softer with less travel, which I prefer.
Not all apps seem to allow middle-click on Win10. I can't recall any that didn't on KDE though.
