with the release of v2.15.1, several 8-button switches including ecodim are now supported in deconz.
They are however very buggy in the phoscon app:
Pairing in phoscon still is challenging, had to do multiple attempts, using the beta switches part of phoscon, then selecting Busch-Jaeger 4 channel wall transmitter.
Configuring the switch in phoscon is not working either - you cannot add it in a deconz group
I use home assistant + node red, so for now above issues dont impact me too much.
Actually, the switch still has an issue with using scenes.
I add a few lights to a group, and build a scene
Scenario 1:
I link it to a Friends of Hue 4 button switch, it works as designed
Scenario 2:
I click link switch, select the 8 button ecodim switch, select a button, assign the scene and when I click the Anlegen button (not sure why it is in german), it goes back to the select switch window (and this continues, the button does not get saved)