Error when trying to install update
Why can’t I update my iPad ?
iPad, iPadOS 13
Why can’t I update my iPad ?
iPad, iPadOS 13
The title of your post suggests that you see an error - but you share no details...
Perhaps these support pages will be helpful with troubleshooting the problem:
If you see an error when you update or restore your iPhone, iPad, or iPod - Apple Support
Error when trying to install update