Is the pizza topping (type/amount) important when using Smart Food ID (SFID)?

No. The topping is not important, as long as the extent of the browning is clearly visible.

For food that is already dark prior to cooking or does not brown/hardly browns (spinach, for example), in some cases, the oven is not able to detect browning or the point at which the food is cooked.

In this case, the oven would end the programme automatically after 60 minutes for chilled pizza and after 50 minutes for frozen pizza.