I’d recommend an Iris plug (linked below). These devices are both ZigBee and Z-Wave Plus repeaters. The outlet itself runs on ZigBee commands, the Z-Wave repeater does nothing but repeat signal.
You can find more information and a DTH for the Z-Wave repeater below. Plug in the module to pair with ZigBee first. Then hit the button 7 times fast to pair the Z-Wave repeater. To reset the device, unplug, hold in the button and plug it in. Next, release the button.