DualR3 Detach Relay

I want to use DualR3 o my Switches to see How much each Bulb consume, but I would like to have Detach Relay to use even better with my Smart Bulbs.
Its possible with software or is a hardware thing?

Both. Such built-in features are generally related to hardware design and firmware instead of basic options in the app.

For DualR3, I don’t think it supports wiring the external rockers, you can use smate or r5 (eWeLink-remote protocol) with it.