iPadOS 9.9.13.6.1 (build 17G6080) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2020-08-12T20:32:04Z. The update package is 2.82 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: f25481fba7d491bee211f131b355ff9990996fff.zip.