What do you search for exactly? The menu looks exactly like mine, save for the Personal Hotspot feature you don't see because you're on Wi-Fi. Did you try tapping on Cellular Data Options and look there?
What iPad Pro do you have 12.9 or 9.7 it could be your SIM card you may need to talk to your carrier about getting a new one most likely you just need to talk to your carrier and they can fix it
So when I bought the iPad they said it wasn't set up for cellular data in USA. The cell phone SIM card when put into the iPad shows the manage sprint account etc.