In terms of the Niro the difference in list prices is reflected in the used prices nothing more really, there's a big spread on Kia prices from factory, yes there will be dealers or private sellers that will attempt to get more, cashing in on the current situation, why wouldn't they if they have something that people want?
I'd never recoup the extra cost of an EV over a similarly specced ICE car I don't do enough mileage, financially a petrol car is better for the cars we like even now, but I have opted for electrified for greenish reasons, pushing the dirty air elsewhere at least as lets face it they are not really that much off an improvement over the life of a car for someone like me doing less than average mileage.
Plenty can recoup though, someone doing 12k a year on a cheap tariff would save 2.1k/yr, someone doing 18k would save ~3.7k/yr so they'd recoup eventually, like the old petrol v diesel debate its about having the right car for your purpose.
I used to do 25k and I was chomping at the bit to get an EV, course back then for that daily distance EVs that were affordable like the Leaf didn't used to be able to cope with that round trip
At the moment I think the premium is just early adopter cost and its starting to swing the other way, once ICE stops in the next few years there will be more alternatives to suit all budgets.