Also can put a fader plug-in into the first insert slot. That leaves your Cubase faders alone. Sonalksis Free-G is something that can get this done.
Also, if you have Control Room activated, you could set up the Listen function to do this, dimming the other tracks by whatever amount you’d like.
Another option is to turn up the inpt in the rack “Pre” section.
Hope this gives you some good ideas 