Often the smart lock 4.0 pro, is not connected to wifi (router as the crow flies no more than 2 meters away and without obstacles) so I assume it is an energy saving problem. This means that it is not controllable if you are away from home, and often even being at home but out of bluetooth range is offline, even voice commands with alexa 90% fail for the same reason. Returning to Alexa I own an Echo Show 10 third generation that has Matter support, but it is useless to try to pair it because Alexa the most dffused home automation system is not yet supported strangely, I wait for it to be, hoping that connected via MatTer offline problems will disappear and better battery life, which with moderate use comes to make 2 months autonomy