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 placeholder images and dummy content for you to replace with your actual content. It does not include the Sliders
While the Expanded Demos will import everything, including the slider given that you installed the Revolution Slider extension before you imported the Demo.
If you need a ready to go site, I advise that you import one of the Expanded Demo instead.