frozen on swipe up to upgrade

My daughter did an update a few days ago on her iPhone XR (I think she selected for it to update while she was asleep). When she woke up her screen is white and says at the very bottom, "swipe up to upgrade." We have done the hard shut down *up volume*down volume*power button hold* and it will shut off and when it comes back on same screen. Connected to computer with iTunes account and iTunes didn't recognize the phone so I couldn't restore that way. I have an appointment at the Apple store but that is a week from now! An y other ideas of how to get this going? See picture of her screen. Thanks in advance.