iPad 11 pro wont charge and keeps just flashing the dead battery symbol

Hi Kenneth,

this support page may help you: https://support.apple.com/en-us/HT201569

If your device charges slowly or won’t charge

Follow these steps and try again after each:

1. 1. Check your charging cable and USB adapter for signs of damage, like breakage or bent prongs.1 Don't use damaged accessories.
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   4. Use a wall power outlet and check for firm connections between your charging cable, USB wall adapter, and wall outlet or AC power cable, or try a different outlet. 
   5. Remove any debris from the charging port on the bottom of your device, then firmly plug your charging cable into your device. If the charging port is damaged, your device probably needs service.
   6. 
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   8. Let your device charge for a half hour (if your device is unresponsive afterward, learn what to do).
   9. Force restart your device: 

• • • iPad models with Face ID: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Press and hold the Top button until the device restarts.
    • iPhone 8 or later and iPhone SE (2nd generation): Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Press and hold the Side button until you see the Apple logo.
    • iPhone 7, iPhone 7 Plus, and iPod touch (7th generation): Press and hold both the Side (or Top) button and the Volume Down button until you see the Apple logo. 
    • iPad with Home button, iPhone 6s or earlier, iPhone SE (1st generation), and iPod touch (6th generation) or earlier: Press and hold both the Side (or Top) button and the Home button until you see the Apple logo.

1. 1. Let your device charge for another half hour.
   2. If your device still won’t power on or charge, take your device, charging cable, and charging adapter to an Apple Retail Store or Apple Authorized Service Provider for evaluation. You can also contact Apple Support.

hope it helps.

Charles

The cable or charging brick could be defective as one thing. Have you tried a different cable/charging brick?

See this link for suggestions and if nothing helps, schedule an appointment at your Apple Store Genius Bar for evaluation --> If your iPhone, iPad, or iPod touch won't charge - Apple Support

As described, your iPad battery has failed. You only other self-diagnosis step is to systematically exchange your Power Adaptor and cable for another known good example.

If your iPad will not power-on after being connected to the Power Adapter for an extended period, its dead.