There are 45 dishes ranked on this page. The lightest is Kopi O at 60 kcal per 1 glass, the heaviest is Bubble Tea (Pearl Milk Tea) at 380 kcal per 1 medium (500ml), and the average lands around 179 calories a serving. 40 of them come in under 300 calories.
The spread here is narrower than most categories, about 320 calories between the lightest and the heaviest. That means portion size and what you order alongside it matter more than which dish you pick.