Is it possible to update Sonoff sensors firmware?

Configuration Zigbee
1

Is it possible to update Sonoff sensors like the snzb-02 or the SNZB-02D? Are there newer firmware versions?

2

You might want to let people know what your current firmware version of these sensors is.

BTW:
The only Sonoff device that shows up with a ‘Check for new updates’ button in my Zigbee2MQTT dashboard is the Sonoff SWV, but then again: I don’t have an SNZB-02.