i tried to connect a Nuki 4.0pro via Matter to Home Assistant (i use the Apple Thread Network, but connect the Nuki directly to Home Assistant).
I have installed the latest Firmware (4.2.6) and also HA is up to date. Since 4.2.6 Nuki supports the unlatch action, but unfortunately i can`t seh the unlatch button in the lock entity…
My other Nuki 4.0pro, connected via MQTT, shows the unlatch action.
As it is stated in the other thread, the type of the lock should be set to knob or bar. It did not change immediately for me after I changed it. I reinterviewed the node, restarted both the Matter addon and the integration, and then it was active. I do not know if all actions were vital, but they did the trick.