I don’t have the expertise to answer you about the Somfy RTS extension key you mentioned since I don’t have Somfy at home.
If the devices you use are Zigbee, and compatible with Zigbee2mqtt (the software we use in Gladys), then you can bring them into Gladys but you will need to remove them from your Enki box (List of Zigbee2mqtt compatibilities: Zigbee2MQTT )
The box’s Alexa and Zigbee compatibility, however, does not allow it to communicate with Gladys.
I don’t know much more about the Enki box, but it seems fairly proprietary and closed.
If you want to switch to open-source software like Gladys, I strongly recommend that in the future you look for open protocols like Zigbee for your devices
