Why has it been 15 hours backing up to iCloud and now says 22 more?
iPhone has been backing up to iCloud for 15 hours and estimate just gets longer. Says 22 MoRE hours.
iPhone 12 Pro, iOS 14
Are you seeing any accompanying messages or notifications? Is the device plugged in to power and connected to a robust WiFi? See also -- If you can't back up to iCloud or restore from iCloud backup failed - Apple Support.