Hello @dpea !!?
I'm glad I found the first Brazilian here working with Hubitat.
I haven't purchased the zigbee outlet but I bought a Zemismart wifi version instead, it's
still on the way.
But I guess it would work as a generic switch as you mentioned.
I have a few Xiaomi devices here, motion sensors, door sensor, buttons and they are working great so far, but I wouldn't go for those 3.0 zigbee outlets as Xiaomi zigbee are known by having issues to stay and keep paired. If you research here will find a few topics about it and how people workaround.
All my smart devices are zigbee so far, but I'm starting thinking of buying wifi ones as we virtually have only one way to buy stuff here in Brazil witch is AliExpress.
For Xiaomi devices drivers check this thread :
[Release] Xiaomi / Aqara ZigBee device drivers
If there is any integration with a Xiaomi devices you will most likely find there.
Well, let's keep in touch.
See you