iPadOS 13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2020-01-14T18:20:41Z. The update package is 180.2 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: 9d2180720613fc33981f5ebf164d1386bb7699b9.zip.