Allulose Artificial Sweetener

It does not appear that myfitnesspal recognizes the artificial sweetener Allulose when calculating net carbs. Allulose technically does have some carbohydrates, but they don’t count since your body will not metabolize them. A teaspoon of allulose has 4 total carbs but 0 net carbs. Allulose has a glycemic index score of zero. What do you do when you come across this sweetener but it is not accounted for in your net carbs calculation?

Thanks