are syrup more flavorful than powder or similar?
45 gm of vanilla powder (pointing to the box the keep the powder in) 2 pumps of mango (Pointing to a big jar of a mango syrup) and spoon of cinnamon
all belnded in a 16 ounce cup of ice

That sounds like it's vanilla-flavoured powder of some sort, perhaps milk-based, (or plant-milk-based), perhaps including maltodextrin, to give texture as well,  It could even be flavoured protein powder in some places (though they'd normally say so); that's about the right quantity compared to when I've made chocolate-vanilla milkshake with vanilla protein powder.
Certainly anything purer than that wouldn't be used in such large quantities.
As far as mimicking it goes, I'd start by using a teaspoonful of extract, and 45g of your best guess as to the rest of the powder.