iPadOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, WiFi), released on 2019-06-24T17:17:08Z. The update package is 217.83 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: ad66d41fb7434eaec55ec98d3c22642c2c3637b1.zip.