Choose an OTA for iPadOS 9.9.26.4.1 Choose an OTA for iPadOS 9.9.26.4.1. IPSW Downloads provides download links and information for Apple's operating systems, including signing window information.

#iPadOS 9.9.26.4.1 (23E6254) [Beta: #iPadOS2641Long] has been released for 36 devices https://ipsw.me/otas/iPadOS/9.9.26.4.1