There is no setting for aligning Ninja Forms’ required fields message in WordPress or Elementor. You can change the style or alignment with a bit of CSS. Or, if you want to hide it use the same code but use “display:none” instead of text-align.
CHANGE THIS:
TO THIS:
In your theme’s Customizer > Custom CSS add this.
.nf-form-fields-required {text-align:center;}
Or if you are using Elementor, you can put this in the Ninjaform widget’s Advanced > Custom CSS section.
selector .nf-form-fields-required {text-align:center;}