Multiple areas per device

I originally opened this as a feature request for ESP Home, but was pointed to open this as a HA feature request.

Describe the problem you have/What new integration you would like

I have several Sonoff 4ch’s which control devices in several different rooms. The Sonoff devices are centrally located out of the way (in a cupboard and in the loft), but they control devices (lights & extractor fans) in other rooms. I’d like to use the Home Assistant Areas feature per-relay

Please describe your use case for this integration and alternatives you’ve tried:

I’d like to be able to set the Area per relay, not per ESP device

Additional context

My devices are connected via the ESP Home API