I’m not an expert in any way, but I have found a way to make these plugs somewhat communicate with ST.
If this plugs use the Smart Life app then it is possible to make them work with IFTTT and SmartThings as long as you are ok with waiting 1-1.5 seconds extra for your plug to turn on/off and you count on an Always ON internet connection. I have so far been using many of these plugs since they have been coming up on sale for months and I have found a way to bridge ST and the Smart Life app using IFTTT. Every single one of my plugs I can manage them via the ST app, Asking Google Home to turn these on/off does update the ST app and triggers the action withing the first second 1 or 1.5 sec.
So far I have the following models: XS-SSA01, TUS-001, JH-G01U and YM-WS-1, The former 2 will appear in IFTTT for the Smart Life app while the rest will require the user to create a Scene within the app that will show up in IFTTT.
ST integration requires creating a virtual On/Off Button Tile and create an applet in IFTTT to bridge both the ST Tile and the Smart Life plug (or scene).
In a short sentence: it is possible but not the classical way; it will require some knowledge and it is kind of tedious. But once is done it’s done.