I was in the exact same problem,here what i did:
1.Configure your sensor in aqara app,no need to reset it when it’s done.
2.Install the test version(0.0.010)of the Homekit controler. HomeKit Controller | Homey
3.Unplug your sensor
4.Start the processus to discover new device in the Homekit app.
5.When you are at this image
6.Plug your sensor(the led blink one time in yellow and 2 times in blue),you have to click to search devices when the led is yellow.
