iPadOS 13.4 (build 17E5249a) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2020-03-03T18:19:50Z. The update package is 728.36 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: 9b8af652aa29658dc44959159d7d988ae751b437.zip.