
Android 15 and higher
If the default wallet app turns on Observe Mode on a device that supports it, then that app overrides unlock and screen-off behavior, because it controls when a transaction can proceed. Some wallet apps might require the device to be unlocked before a transaction can proceed if Observe Mode didn't detect an identifiable polling loop pattern.
Developers are encouraged to work with their reader devices to emit identifiable polling loop patterns and register to handle those patterns from their app.