iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, WiFi), released on 2019-12-17T18:13:03Z. The update package is 188 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9c9f074d04e0e3c00d9fb16678d3206316054207.zip.