Problem is there are no type approved (Road legal) LED bulbs.
Even if you already have LED bulbs fitted by manufacturer putting in new LED bulbs would be illegal.
For some strange reason the whole headlight unit needs to be changed, as this is the part that is type approved.
Would you ever get done for it? Probably not.
It's not as if the LED headlights fitted in the e-niro are anything special, not worth the expense of swapping entire unit for the little gain. Plus also to note is how cheap the halogens are to replace, if you had a fault with the LED light then it'd probably cost a lot more.