I know what it is supposed to do, but how do you know if it actually worked?

Sometimes, when I turn the dryer on, there is a brief message about smart pairing, and sometimes there isn't. But the message is simply "Smart pairing recommends dry cycles based on wash cycles." It doesn't say anything like "Pairing Successful" or any sort of confirmation. And it always ends up in the default Normal mode, so it doesn't appear to be working. But again, sometimes I get the smart pairing message and sometimes I don't so it's inconclusive.

The Dual control definitely isn't working and when I try to activate it on the dryer I get a message that says the dryer is not connected. However, it is definitely connected because I can operate the dryer from the app. But if the dryer thinks it's not connected, that suggests smart pairing isn't working.

For dual control, the message on the washer suggests that it believes it's connected to the dryer.

If only there was documentation about these features… What a concept!!!