Just figured I'd let everyone know that Amazon in the US is going to be restocking the SmartThings Zigbee Outlets soon. "In stock on February 23, 2021." Hopefully we will get a restock of the buttons at some point as well.
Good news. I have both this plug and the Moe's Zigbee 3.0 plug w/2 USB ports. The zigbee signal on both, according to XCTU is the same, but the Moe's is 1/2 the price, zigbee 3.0 and has 2 USB ports.
I bought those also, loved the size/form. They had a low LQI, according to XCTU with and Xbee.
I would say try them and observe. I only tested them for about a week before returning.
Use http://192.168.0.92/hub/zigbee/getChildAndRouteInfo (replace my IP with yours)
Check the threads for how to read the results. Essentially LQI=higher is better; cost in/cost out = lower is better(not zero tho)
FWIW, while I haven't used them with Hubitat, I have used them with zigbee2mqtt. I'm seeing reasonable LQIs, stable routing through them, and they support multiple child devices.
Edit: Just moved the two I have to Hubitat. I'll have stats on them in a few days.