Estimated time remaining

I cannot see on the picture that you posted but ensure that-

1. Your device is connected to a WiFi Network
2. Your device's battery is charged more than 50%
3. Your device is NOT connected to VPN
4. Your device has Low Power Mode set to OFF
5. Your device has sufficient space remaining to download and install the udpate

Axel F.

When your iPad shows you the estimated time remaining then what happens?

Do you have a screen shot that you can post here?

Axel F.