iPadOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2019-07-16T17:39:10Z. The update package is 273.42 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 31bf678b673dc3aa49842a1a7cf7463bb4d008a0.zip.