iPadOS 12.3 (build 16F5117h) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2019-03-27T17:06:02Z. The update package is 295.05 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a181bf09019bf08b23b739bcb20392c6e492ecfc.zip.