I’m having the same issue with a First Alert combo smoke/CO detector. Model ZCOMBO-G. Shows up in OZWCP, but doesn’t show up anywhere in HomeAssistant.
OZWCP shows Alarm Sensor First Alert ZCombo Smoke and Carbon Monoxide Detector and the value updates correctly if I press the Test button on the alarm.
HomeAssistant doesn’t show this device anywhere on the frontend, or in the development tools < >
Any ideas?