My new iPad has suddenly become unresponsive to touch

A forced-restart will often resolve isolated issues:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On an iPad with Face ID: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.

If your iPad doesn’t turn on, or if it gets stuck during start up, see the Apple Support article If your iPhone, iPad, or iPod touch won’t turn on or is frozen.

Tap and read this Apple support link for some additional help, if needed.

If the screen isn’t working on your iPhone or iPad - Apple Support

The best you can do is to continue to alert Apple to this growing issue and hammer the Apple iPad feedback pages mutiple times on this issue.

The only way to get Apple to, DIRECTLY, listen to you is to use their feedback portion of their website.

iPad Feedback

http://www.apple.com/feedback/ipad.html

Cognizant Apple employees read ALL feedback generated from all of the various feedback pages and transfers the data to the proper and responsible Apple teams and personnel , but NO Apple employees will ever respond with any type of direct, individual replies from the feedback you post.

You can post as much multiple feedback about this issue any time.

The more users that post product feedback about any product issue, the faster Apple is made aware and starts working on a fix/solution for a future software update.

Best of Luck to You!