After my iPhone 15 Pro auto-updated last night to iOS 17.2.1, my iPhone touchscreen became unresponsive to any touch. I read this thread and tried a hard reset multiple times, which did NOT work. I called Apple support, who told me they couldn't do anything to help and denied this being an iPhone problem..."never heard of this issue before you." They recommended I drive to an Apple store.
When I plugged my iPhone into my computer, it notified me that the phone was in DFU mode, and only left me the option for a factory reset.
I really didn't want to reset my phone to factory settings, but ended up driving the Apple store 40 minutes away, who told me to just reset my phone. If it didn't work, they'd give me another phone. I reset my phone and it seems to be working for the moment. My iCloud backup was backed up last night, so it is currently restoring all my apps and such from the iCloud.
My conclusion: I think there is some glitch in Apple's update that causes the touch screen to become unresponsive. This is quite a hassle to restore an iPhone. This process took about 5 hours of my time.