Software update

Hey there ,

This is unexpected behavior Turn off the low power mode and restart the device through the steps in this article ☞ https://support.apple.com/HT201559

If you still can’t find the software update option let us know!

have you tried to go into

settings->battery and disable lower power mode that is what cause your battery bar to show as yellow and is likely what

is blocking you from beginning an update, I'd advice you put the phone to ac current while updating