Even if there are a lot of us that follow a low-carb lifestyle (I'm including keto, diabetic / pre-diabetic here), they probably don't offer much because it doesn't get ordered much as we tend to be careful about desserts marked as "sugar-free," because some of them have a lot of carbs that can cause glucose spikes and it doesn't make sense to devote a lot of resources to prepare something that may or may not be ordered/requested. I'm not familiar with NCL's sugar-free desserts, but I've seen crazy stuff marked as "sugar free" that I would never order (e.g., brownies made with flour and starches come to mind). I also need to know what sugar substitute(s) are used as they don't all hit the same (e.g., stevia is OK for me, but I avoid maltitol, sorbitol, etc.) and that is often difficult to find out.