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The info at the top is just info about the fields available, not actual data - and it's still there in Catalina. It only tells you that the device model (mmod) is a field of up to 30 characters.

No device model info is shown in your shot, either.
Screen Shot 2019-12-16 at 4.07.59 PM.png
This is the mmod box, the model is the second box in.
Most disregard the zeros, so my screen model is 9CDD.
 
Son of a gun. That info didn't change when I tried it before, but I definitely see model data now 😕

Gotta love that serial number -
modelNumber.png
 
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