iPadOS 9.9.15.2.1 (build 19C6063) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2022-01-12T18:06:58Z. The update package is 3.89 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: 67cd5125efba1c6f543688b42eb0fd372e0c220f.zip.