iPadOS 15.7.3 (build 19H307) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2023-01-23T18:47:58Z. The update package is 636.07 MB. This is a delta (partial) update that requires 15.6.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b686357570d7cfaf2ab761bfc6acd6d700931806.zip.