@LaSiroque
see above:
I do not know if you have navigation.position or environment.outside.temperature, but seeing your list of wind data, looks that you may need signalk-derived-data plugin for environment.wind.directionGround (DEPRECATED and unchecked in your list).
One can calculate environment.wind.directionGround from true heading and true wind anglen (you need these, at least). signalk-derived-data plugin can do this for you.
For environment.outside.temperature you would need a sensor. It is a sensible requirement for a weather station that it submits a temperature value for your (moving) spot.
You can study your existing instruments, maybe the data is available but not transmitted for some reason. For example, I have two temperature values available, one from the barometer and one from the ultrasound wind sensor. My barometer is inside the cabin so I had to disable its temperature value in favor of the value given by the wind sensor.
If you have no luck, the easiest way is to purchase a sensor, which can be plugged in on your NMEA-2000 bus (or its Raymarine etc. derivates with an adapter), for example https://www.yachtd.com/products/sensors.html
