Touch ID is not working on my new iPad

Here is how to set up Touch ID: Use Touch ID on iPhone and iPad - Apple Support

You’ll need to use the passcode after a reboot, and then every again day or two thereafter.

If Touch ID is not working after the setup, contact Apple Support.

The iPad User Guide describes the straightforward process of setting-up TouchID:

Set up Touch ID on iPad - Apple Support

If you are having difficulty setting-up TouchID, refer to this support page:

If Touch ID isn't working on your iPhone or iPad - Apple Support