iPadOS 9.9.13.4 (build 17E255) is an official Apple over-the-air update for the iPad Pro (10.5-inch, Cellular), released on 2020-03-18T17:21:57Z. The update package is 2.95 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: 17200c13ba77f1aefea9ee3fe5df07985834b333.zip.