M1 iPad Pro WiFi Connected, but Unable to Download this Update

iPhone 14 Pro to iPad connecting Wi-Fi perfectly work, but iOS not updated.
Unable to download this update requires a Wi-Fi network connection to download

hi bro, restart iPhone once. make sure its not hotspot wifi. because software updates dont work when we connected to wifi hotspot.

It should be wifi router connectivity. that will help to download the update.

Let me know if error still continues we can try other troubleshooting methods.