My 12.9 inch iPad pro touch screen isn't responding at all

Have you tried the following?

Get help with the display on your iPhone, iPad, or iPod touch - Apple Support

iPad, or iPod touch: Press and hold both the Home and the Top (or Side) buttons for at least 10 seconds, until you see the Apple logo.

If it still isn't working after that then you are best to contact Apple Support or take your device to an Apple Store or Apple Authorized Service Provider

You could try restoring to factory settings Restore your iPhone, iPad, or iPod to factory settings - Apple Support before contacting Apple if you prefer to do that.

The usual caveat of ensuring you have fully backed up the iPad applies.

If you can't do a factory reset, then the hard reboots are about as far as you can go software wise. Use the online contact options for Apple who can advise further.

If you are EU based then as it is likely under 2 years old (or just over) the enhanced consumer protections should mean they repair or replace at ideally no cost. Given that Apple is a premium brand and it is reasonable to expect even a non premium tablet's touch interface to last longer than yours appears to.

Though hopefully its a not a physical fault and you can repair whilst in contact with Apple support.

Hi

Try a reboot press the power button down &menu button hold both down until you see apple logo this can take 30 seconds.

Cheers

Brian 🇬-1F1E7;

Could be a physical fault if the hard reboots aren't working.

I would contact Apple support who can advise further hopefully it can be fixed without needing to do a physical repair.