My iPhone XR has frozen, and won't turn off.
When I try a hard reset (holding down side button + volume up) all I get is Siri asking if I need help. If I wait for a while I get the lock screen which opens with Face ID, but when I swipe up I get a black screen with a grey bar at the top under the notch (like the "forehead" in older models). I can't access Settings to use the Accessibility workaround. All I can think of is to let the power run down (two days?) and hope for the best. Any suggestions?
iPhone XR