Fixed it. I was creating the group in the Kasa app. When I created it in the Amazon Alexa app then it worked

@Tony same result. I also tried the Good night scene with no success Tim

@Tony for example - the devices are called lamp 1 and lamp 2. They work fine. I created a group - have given it a variety of names - for example house. In the Kasa app I can turn on or off both via...

I have two smart plugs collected into a group. On the Kasa app all works fine, both individual plugs and the group turn on and off. With Alexa the individual plugs (lamp 1 and lamp 2) work fine, but...