Thanks for writing about the issue.
I will look in to why you can't see the sensor if it is a light_hue, light_saturation, light_temperature and light_mode. Will report here when I know why it is not visible.
The issue you have with label in the mobile app is nothing i can do.
It is a issue you need to report to homey.
In the app you can't control where the labels or anything else is in the mobilecard..
It took a few month before the homey team added function so you could change the label of a capability. So i think they have missed this function in the mobile app.