How can I make a touch x axis control that encompasses the whole screen?

What I’ve been struggling with is trying to find an alternative to the mouse x axis control for pc, but for mobile.
The mouse x axis control yields no result with touch input on the phone, and there is no alternative “input” in the input section(?) of the blueprints, and frankly, I have run out of ideas to try.

If my intention is somewhat unclear, imagine this.

I want to be able to put my thumb down, move it along the x axis, wherever on the screen of my phone, and have that be recognized as a control input. How?