It is a very long shot, but it would be interesting to see if the Thermometer would even be reported as on your account if you loaded up the "Govee Immersion LED driver" and went through the initial setup.
It does look like the Govee API though it doesn't have any information related to your device could just be a undocumented option. Can you try to load the Govee Immersion LED Strip driver and then get the logs when it tries to do the initial lookup. I am curious what devices are showed in the return information. It is a very long shot, but if the device is listed then it may not take much to create a driver from that. My Hope is that it would show up with no controllable commands, but will be retrievable. Then it would just be a driver that would pool the Govee api on given intervals. Again if this does show up it is undocumented.
This idea has nothing to do with the plug in mentioned above as that is just a BTLE listener.
