Most likely not implemented. There’s no reference to night mode in the MQTT API documentation, and Night Mode does not exist as a switchable entity in general (not available in the Bridge HTTP API either for example): You don’t switch Night Mode on or off in the app, you switch the schedule for Night Mode on or off. (Even if you move the Night Mode slider to “On” in the app, that doesn’t mean that the lock is in that mode, unless you’re also in the scheduled timeframe.)