Display of net carbs

Sort of.

It will count net carbs rather than total carbs, and show those net carbs on various pages/reports in place of total carbs.

Just as in free MFP, it will also track fiber and let you report on that or change one of your diary columns to show it.

I can't illustrate the net carbs feature for you even though I have premium, because I honestly don't care what my carb intake is, let alone my net carbs. (That's just me, not criticism of you doing it differently, BTW.)

I did customize my diary columns - which you can also do in free MFP - to show fiber. I wasn't remotely interested in seeing sugar on my diary (yeah, just me again) especially since sugar is effectively already included in carbs, so I dropped sugar as a diary column and added fiber instead. There is a limited number of columns. This is how that looks in the phone/tablet app in landscape orientation. Web browser MFP looks similar. I believe that premium would let me show net carbs in the carbohydrates column, if I wanted that.

I suspect that what I eat may be horrifying to someone who prefers low carb eating, but it works for me. The point is to show the format, not particularly what or how I personally eat.