iPadOS 13.5 (build 17F5054h) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular, 1TB Model), released on 2020-04-29T17:07:09Z. The update package is 217.09 MB. This is a delta (partial) update that requires 13.4.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: becbe9549dde298224ce7cd5981b269038fb5ecd.zip.