iPadOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, WiFi), released on 2019-07-16T17:39:21Z. The update package is 332.02 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: c4fc0669f1610cdadac3d64bd2538f8092ae056a.zip.