iPadOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, WiFi), released on 2018-04-16T17:07:55Z. The update package is 218.02 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7135fe765596dd07d4e88191c6ddb0336fd42385.zip.