Yep. The related indoor plug is a Wi-Fi model also.
https://m.lowes.com/pd/Iris-120-Volt-White-Smart-Plug/1000509605
It’s the zigbee models, at least the second generation ones, which can work directly with the smartthings hub.
For the others, it’s really like any other Wi-Fi device:
The fact that it doesn’t work with Echo is a bad sign, since that’s usually the first integration that they add. 