Welcome to the community, @AlbaVerrat. Please this comment. 
So, It does show when the device is off-line. But that means I need to continuously look to see if it is off-line. The app apparently knows it is off-line so, how hard would it be to send a message it is off-line? I have a remote building that it would be nice to know when I loose power in the middle of winter.
Thumbs up from me about getting an automated message when it isn’t connected.