Both the Kia and Hyundai both have battery cooling - it's just a fan that moves air through the battery, but it's something at least, but way less effective vs a system that actively uses the AC system to remove heat. But, again, better than nothing, which is what the Leaf (unsuccessfully) and the Egolf have opted for.
There's some interesting reading on the Egolf's lack of active cooling
here. I hope the engineering results and real world results end up being the same - sometimes those things don't work out so well, however.
As for the heat pump vs grid heating, don't get too excited about it - heat pumps only work down to about -10C, and cars equipped with them very much do still have resistive heaters that kick in during high demand, or when the outside temps drop too low. When I did some digging VW themselves also mention that it's only ~30% more efficient than the grid heater as well.
My experience with heat pumps, admittedly not recent, was not great - low vent temps that
maintained a temperature decent enough, but useless for rapidly heating up a space (which people expect in a car) so electric grid comes into play quickly...and once outdoor temps start to creep too low for a heat pump to work efficiently, you are basically back to grid heating.
Found lots of references to sub 200KM ranges in the winter as well.
Some more interesting reading on grid vs heat pump
here, specific to the Ioniq.