How to hard start iPad pro
How can hard start my IPad Pro ?
What exactly do you mean by hard stat?
Do the steps outlined in the support document you came from to restart the iPad not work for you? Or is that not what you want to do?
Did you try the steps in the link at the bottom of the support document for when the device is not responding or frozen?
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support