So a genuine zigbee 3.0 coordinator is automatically compatible with ZHA 1.2 profile devices, and genuine zigbee 3.0 profile devices should automatically step down to ZHA 1.2 when paired to a ZHA 1.2 coordinator like Hubitat.
Agreed. The Third Reality water sensors I linked to above are guaranteed to work with Hubitat, and also work with a zigbee 3.0 coordinator - I have confirmed they work with zigbee2mqtt using a CC2652P2 stick that is flashed with zigbee 3.0 coordinator firmware.
And there's a whole thread about their function with Hubitat:
Like the Aqara sensors, they have external screw terminals, permitting them to be adapted for other purposes.
