Thank you for writing in, In X there are two types of Demo the Standard Demo and Expanded Demo.
The Standard Demo like Integrity 1 demo (what you have now) will only import the customizer settings and home page with place-holder images and dummy content for your to replace with your actual content. It does not include the Sliders
While the Expanded Demo will import everything, including the slider given that you installed the Revolution Slider extension before you imported the Demo.
If you need the same kind of slider, you can follow the guide that provided here.
Hope this shed some lights,