iPadOS 13.4 (build 17E5255a) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, Cellular, 1TB Model), released on 2020-03-10T17:21:15Z. The update package is 824.13 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e5083c418a5a22c876b4c36b09a2b203892be42f.zip.