iPadOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, WiFi), released on 2019-07-09T17:16:07Z. The update package is 126.27 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 74ccb2199b77517727d6e63d8f29ac4c15d9bd33.zip.