Normal, the newer one’s have the triple injection system so use triple the amount of Adblue and they only have a small tank compared to some of the other manufacturers, it is a bit of a payoff but having to put more Adblue in in order to get the emissions down to near nothing is worth it and you can have it refilled for free at your chosen dealer or just do it yourself if able as it’s not that dear TBH.
I get mine done once it drops below the 1,000 miles remaining mark and I’ve had it done 7 times now on this car.