IPad Pro keyboard not working

Hello, RPauli. Welcome to the Apple Support Communities! You’ve come to the right place to get help with using your Smart Keyboard and iPad Pro. We’re happy to help you look into this connection error to find out what we can do to fix this. 

To get started, we would like to provide you with an Apple Support article. This article explains how to use the features of your Smart Keyboard, it also contains troubleshooting steps if you are unable to connect your keyboard as expected: 

Use your Smart Keyboard Folio or Smart Keyboard with your iPad - Apple Support

According to the article above: 

“If your iPad doesn't detect your Smart Keyboard Folio or Smart Keyboard or you see an "Accessory not supported" alert on your iPad, make sure there's no debris or plastic covering on the Smart Connector pins on the keyboard or the Smart Connector on the iPad. 

Also, try these steps: 

Make sure that your iPad and Smart Keyboard Folio or Smart Keyboard are in the Type position and that you have the latest version of iOS or iPadOS. 

Remove the Smart Keyboard Folio or Smart Keyboard from your iPad. Restart your iPad. Reconnect the Smart Keyboard Folio or Smart Keyboard.” 

We hope that these troubleshooting steps can help you get back to enjoying your iPad and Smart Keyboard again. Please reply back here if you have any other questions.

Cheers!