Hey Timi,
I think I understand what you want to do. The datasource returns several fields that measures different things such as temperature (°C) and power (W) that you want to use in the same canvas.
This is possible by using "Field Overrides" in the bottom of the configuration on the side. You can specify fields to match the override for using name, regex and other options. For each field with a unit, create a mathing override and set "Standard options -> Unit" on just those fields.
Result:
