Zigbee button - action is missing in HA

Ah, found this discussion, and [this specific post](Action entity missing for zigbee switches - Zigbee2MQTT - #20 by jdbrookes].

I then did the following:

  1. Open Zigbee2MQTT
  2. Settings
  3. Home Assistant integration
  4. Enabled “Home Assistant legacy action sensors”

…problem solved.