Select you own icon for a device

Agree!

Since Athom is reading along, hopefully the request will be added on their list.

But I do not know if it is technically possible. Perhaps an app developer could comment this.
I also don’t know if it is wanted. Some apps are programmed by the device companies, like the Aeotec app. I can’t imagine that Aeotec would agree that their own icons being replaced by other icons.