You can’t configure it but there’s patches around where you can hardcode a modifier with very minor side effects.

The thing with Wayland, and things like libinput, is that it wants to give the compositor a lot of power and hopefully enable more things, so there’s not one implementation like Xorg that you’re just stuck with what it provides. The compositor knows more about what’s going on, and the application even more so. So in theory you can have all sorts of inertia curves. But in the meantime we have this silly situation, where you can’t even adjust it at all.