The TP-Link smart plugs will work in full concert only about 75% of the time; it's Home => Kasa, then an Alexa => Kasa integration.
"Ok Alexa, turn off/on the Living Room" gives me hilarious permutations of which of the three light up, are delayed, need to be asked again, etc. I've done enough wireless network testing locally to know it isn't network strength getting in the way.
It was a nice toe-dip and I'll probably keep messing with the idea of home automation...but I am really not impressed with the lack of responsiveness and consistency. Probably going to shift gears more to localized automation next without involving the cloud.