Hi! I've built a custom smartblinds controller. My device driver implements the WindowShade capability. Works great in Hubitat dashboards and also Homebridge/HomeKit. However, if I expose my device to the Alexa skill, it does not show up in my Alexa app.
I found that it looks like the Alexa team has just added native support for this type of capability last month:
Can you add this to your Alexa skill?
(The capabilities my driver implements are: Actuator, WindowShade, Refresh, and Initialize.)