iPadOS 13.4 (build 17E5233g) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2020-02-19T18:24:25Z. The update package is 800.29 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: a447429294a9ec35d09fdc3c69da3b841de0e363.zip.