Could you share some info on how you got Velux windows to work in homey?
Which homey app? which settings in Connexoon? Any reason to use Connecxoon over ‘Somfy switch’? I do not know anything about either of them. So want to make an informed choice.
I bought a Connexoon, as that was (then!!) the cheapest way to connect Homey to my io Velux screens. Once they work with the Connexoon App / box, they are easilly added to Homey via the App from @Adrian_Rockall called Somfy TaHoma. I believe they are automatically discovered the moment they are also available in the Connexoon (now called TaHoma App) from Somfy.
So, you need a bridge!