Humidity information is quite common with many different climate devices. This metric can be added to the Thermostat card, for example like this:
This was also discussed here: Humidity display on the Thermostat Card · Issue #4740 · home-assistant/frontend · GitHub
If you think this is a good idea, please hit the VOTE button up top!
I voted for this, but if you want alternatives i listed all i could find here 2023.12: Welcome home! - #501 by nickrout
At least, it should be able to configure it, if you want to display this information or not - if the integration / device does provide this information.
If it doesn’t, it can be considered, if you should be able to add the information from another humidity sensor as an alternative