iPadOS 13.4 (build 17E5223h) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2020-02-05T18:16:54Z. The update package is 704.82 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 01c65c433c5f4922367419eea27f48209869e23a.zip.