Alexa control shade group

I have 4 individual somfy shapes registered in bond and grouped in bond. How do I open or close the group via Alexa?

Alexa open shades doesn’t work.

Alexa does not support the control of Groups created in a 3rd-party skill such as Bond Home. Your options are either to create a group on the Alexa side, or to create a single “All Shades” device on your Bond Bridge which directly controls all your devices.

There’s a few ways we may be able to improve the experience of shade groups on voice control, and will share when we have updates.

How would I create a single all shades device ?