iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2019-04-08T17:04:21Z. The update package is 341.62 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: 70393c4893e14f803a1c1eca6a58ba010b952189.zip.