Same with my exora too, 10km/l and its with light foot.
I used to own an axia, I do get 13-14km/l with sprited driving.
Most car with torsion beam in the rear have the exhaust piping over the beam, so you never actually have to worry about minor flood.

My area in KL last time has minor flood so now I don't need to worry boleh pass

Yes. Downward pointing ekzoz, I have to put my head down almost to the floor to take that picture.

Also I want to mention about the air intake located at the bonnet. New Axia has reposition its air intake at a higher position so that it could easily go through minor flood without sucking the flood water.

This pic I screenshot from a YouTube video explaining new Axia.

I thought the logic was to keep stepping on the gas so that engine rev is high to prevent water being sucked into the engine through the exhaust?
of course air intake needs to be high also la, otherwise water masuk through there when going through flood
but of course, if water too high, best not take a risk.
there are videos where perodua cars floating cuz they were too light. myvi and axia kena before i think