https://wccftech.com/apples-2021-cellular-ipad-pro-can-download-ipados-updates-over-5g/

Buying a cellular 2021 iPad Pro its own set of perks, including the ability to download iPadOS over 5G if you have an unlimited data plan.

Apple made the switch to 5G with the release of iPhone 12, and it was only a matter of time the ultra-fast cellular change would spill over to the iPad lineup and it has with the 2021 iPad Pro.