iPadOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2023-03-27T17:11:39Z. The update package is 2.17 GB. This is a delta (partial) update that requires 14.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dab9c3c56643093ec1579ceb25125a7044df5064.zip.