iPad 6th gen cannot update to latest update.

Try restarting the iPad and trying again when connected to a good, stable and reliable Wi-Fi network. Your current network may not be stable enough to complete the download.

If it still does not work, you may need to update using a computer to update your device manually click here ➜ if you're using a Mac with macOS Catalina or later, or click here ➜ if you're using a Mac with macOS Mojave or earlier or a Windows PC.

You tell us.

What happens when you try? Do you get an error? If so, what does it say?

What is the model number for your iPad in Settings ➜ General ➜ About ➜ Model Number.

What iPadOS version is it currently running? Settings ➜ General ➜ About ➜ Version?