Alexa Device Authorization does not see all my available devices (Xioami Leak Sensors, for example)

I just got the Amazon Echo Dot 3rd gen, followed the procedure to connect to ST, discover devices, etc. and all looks nice.
But first not all my devices have been discovered. I couple of aqara water sensors not on the list.
I went to Amazon Alexa SmartApps and disabled access to all devices just to see what is available and then I saw that these devices are not even in any of the lists (switches, thermostats, locks, motion sensors, contact sensors), so basically they cannot be discovered. Also, there is one more Simulated Button not there.

Am I missing something here? These devices are using custom DH: Xiaomi Aqara Leak Sensor, but my other devices are using custom handler and they are there.

Any help is appretiated. Thanks.

You aren’t missing anything. Alexa doesn’t support leak sensors or buttons.


Which SmartThings devices work with Amazon Alexa?

Alexa can be used to control light bulbs, on/off switches, dimmer switches, thermostats, locks, and Routines configured with SmartThings. Alexa can also check the status of motion and contact sensors.