iPadOS 9.9.12.3.1 (build 16F6203) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2019-05-24T17:03:47Z. The update package is 2.33 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b6ff12f69e4bb114d0b3837ff3aa0053c3d3178f.zip.