iPadOS 13.4 (build 17E5223h) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2020-02-05T18:17:05Z. The update package is 711.47 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: 0ac90df88efd3b71b2259a80b12fafcb9eb6f1bd.zip.