iPadOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPad 6 (WiFi), released on 2019-04-29T17:35:52Z. The update package is 401 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: 10d87811fb8fac0dd801962c8d9301fcec7e9563.zip.