IPad Pro 2021

Then read and follow the article linked in my response above. Consider first charging the iPad for several hours. If it still fails, consider exchanging the iPad. Hopefully you purchased it from an Authorized Apple Retailer (or directly from Apple) in a brand new, factory sealed box.

Visit the Authorized Apple Retailer who sold you the iPad and seek assistance there.

If your iPad won't turn on or is frozen - Apple Support