hmm didn't know the scala was that large but the new MQB platform can support a variety of sizes and wheelbases, for example the arteon and alas are both MQB based, so the new platform is able to change depending on the needs of the car I guess.
Wheelbase - 2,638 mm
Length - 4,382 mm
Wheelbase - 2,650 mm
Length - 4,362 mm
Of course the scala is slightly narrower. The Arona could give some info on the size of the Kamiq
Wheelbase - 2,566 mm
Length - 4,138 mm
So around 20 cm less in the wheelbase and around 24cm less in length, so while the Kamiq (EU one), might end up with similar dimensions, it could still be larger or smaller, and if larger, could cannibalize sales from the Karoq as you mentioned.