Considering the time of departure and the length of haul, the offer of soup and light breakfast doesn't seem unusual. Most pax would have already eaten dinner, so if a full-on, multi-course dinner had to be catered for all pax, there'd be a lot of waste. Frustrating of course if this back of clock flight was marketed as offering a full dinner service. Flew SIN-SYD in SQ F Suites a few months back and was quite surprised by how limited the food offering was.