I note in one of the product reviews, that author had to let the device do a firmware upgrade via the Govee app in order to see the Matter connectivity. Are you seeing a Matter option in the Govee app? If not perhaps that might be something to review. Good hunting!
I ended up doing a factory reset and then I could do the Matter pairing in HA.
It only has on/off though… so it is not that useful compared to the Govee app where you can control the LEDs, the fan speed and the width of the oscillation.