iPad keyboard does not work

Are you talking about this SmartKeyboard?:--> https://www.apple.com/shop/ipad/accessories/keyboards?page=1&f=apple-ipadpro_12_9_2&fh=35d5%2B48e4%2B3214

Should be this case, turn off your ipad, disconnect your keyboard, try to clean the smart connector on your iPad and the connections on the keyboard (in the past I used a pencil eraser and a soft brush).

Then reconnect the keyboard and see if it is recognized by your iPad.

Shouldn't be this case, please contact Apple support directly, using this link:--> https://getsupport.apple.com/?caller=kbase&SG=SG004&category_id=SC0300&symptom_id=20186

Regards

Giulio

On what iPad model? with what iOS/iPadOS version? what external keyboard type are you using? What happens when you connect it?

Please, help us to help you.

Regards

Giulio