We have a Python coded application that runs on Raspberry Pi, and we designed a DALI hat to mate with the Pi, with PoE, and a case with fan to go with it . This is being used to control lights, fans, shades in residential projects in many countries. DALI drivers are widely available and affordable.
I think it should be possible to share the same Pi with HA - resulting in a HA to DALI integration. Is there someone with Python / React skills interested to work on this?