A quick update.
My LUNTAK Zigbee 3.0 Smart Plugs arrived yesterday. They paired easily with the hub. They have good connections with the hub and with each other. The Zigbee child table show that they are serving as repeaters for other devices that are too far away from the hub for a direct connection.
As some have already reported, the Aqara water leak sensor is easier to pair that some devices. I already had that working. The Aqara vibration/tilt sensor is reported to be one of the more difficult devices to keep connected. It took a couple of tries before it paired properly, but it has now been working for a few hours now. That is a good sign.
The LUNTAK plugs do not meet my requirement for a power metering plug to use on my backup sump pump. Although some other suggestions might have worked (Shelly and Sinope', for example), I decided to go with the Zooz Zen15 Z-wave power switch. Since I already have one operational on our clothes washer; I know it works. Since it uses Z-wave, I know it won't mess up the Zigbee mesh like a Zigbee power metering plug might do.
Since the LUNTAK plugs work well, I plan to purchase a couple more to replace some TP-Link Kasa plugs. That will allow me to remove the Kasa integration app from Hubitat. I want to minimize cloud based integration where possible.
