I downloaded the Home app and paired it to SYLVANIA Smart+ 3 Led Flexible Light Strips. Siri can successfully control the lights with my phone’s voice control.
I followed the steps on how to connect to Alexa - steps 1-4 were complete, but step 5 was unsuccessful. The device was not discovered by the Alexa app.
I enabled the Sylvania skill and signed in. Alexa app couldn’t find the lights and therefor I can’t control the lights with Alexa, but only with Siri. (And I’m always losing my phone!!!)