iPadOS 9.9.13.5.1 (build 17F80) is an official Apple over-the-air update for the iPad Pro 4 (12.9-inch, WiFi), released on 2020-06-01T17:10:59Z. The update package is 3.16 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: e2c7dc2ef4218bc5b88f8735021f34bef559224e.zip.