The Miele refrigeration appliance was added in the Miele app and immediately afterwards in the Alexa app. This may result in an incomplete configuration.
Delete the Miele refrigeration appliance in the Alexa app.
Deactivate the Miele skill in the Alexa app.
Open and close the door on the Miele refrigeration appliance.
Activate the Miele skill in the Alexa app. Alternatively, select the Amazon Alexa feature in the Smart Features section of the Miele app.
Add the Miele refrigeration appliance again in the Alexa app.