It's not a .cfg, it's a .xml. And if it's not there you might have to change settings in-game for it to appear.
In some cases the devs might even have changed where the config file is, but I verified this one a few months ago.
Well, since he is special he can just setup a special dpi toggle somehow so he "can hit the coolest muscle memory flicks 180"
I hear that's what all the pro Valorant players do....constantly flick 180 at every scope FOV without even looking where they are aiming. I guess we're just not pro enough to comprehend this.