Issues with Alexa device's

The athom homey connection is from Alexa to homey, so then you need to connect your device to homey (not a skill on Alexa). There is also an app developed on homey that can use Alexa (and skills on Alexa), this one..

It does disconnect from time to time for me, and it’s still work in progress, but could help you out if you want to keep the device connected to Alexa.

Overall if the device is supported by homey it can probably do the same, and is more stable than connecting it to alexa and control it from homey (within alexa all works fine)

The app (link above) works ONLY if you have a homey Pro, not on the homey cloud/bridge.