Hello and welcome to Apple Support Communities fmb70,
We see that you're having an issue with your Smart Keyboard not working after updating the software on your iPad. We understand your concern, and we'd be happy to look into this with you.
Take a look at the articles below with some steps in them that can help.
If you can't connect your iPad to your Magic Keyboard, Smart Keyboard, or Smart Keyboard Folio
Use your Smart Keyboard Folio or Smart Keyboard with your iPad
If you go through these articles and the issue remains, respond back with some more details. What happens when you try to use the keyboard with your iPad? Are you getting an error message? If so, what does the message say?
We look forward to hearing back from you.
Have a great day!