If you’re referring to the Schlage Lock Alarm Mode and Sensitivity Change and Monitor here, that’s a separate SmartApp that utilizes the specific features of the Universal Enhanced Z-Wave lock device handler which aren’t provided by the stock SmartThing device handler.
However, this Lock Code User Management SmartApp is now completely functional with the new stock Device Handler thanks to the patches and upgrades incorporated by ST into the Z-Wave and ZigBee handlers.