Is it possible to add aqara devices in homey and in aqara hub?

You can add several Aqara devices to a Xiaomi hub and then add that hub to Homey so it’s devices become available in homey too.
But:

  1. You will have to use a Xiaomi hub and therefor the Xiaomi phone app on your phone to control it
  2. Only some hubs are supported. I use the one with partnumber DGNWG02LM.
  3. The developer of the app you have to use (link) is ending his support for now. The app will continue to work though; see here.
  4. Not all Aqara devices are supported, see a list here. The Aqara Water Leak Sensor sensor_wleak.aq1 is listed as supported.
  5. No guarantees

It’s a bit of work and you will require an additional hub if the one you have now is not supported. The DGNWG02LM I have doesn’t have to be expensive though and is probably also available second-hand. But it might be your best shot at having the device available in both Homey and another hub/environment

But why do you want the device in both environments?

(The above is also a way to connect Aqara/Xiaomi Zigbee devices over LAN to your Homey)