iPadOS 13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2020-01-14T18:20:39Z. The update package is 152.07 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: c2f0185a3b4268722d163e9591eff133f38ca17a.zip.