The car want speed up cuts off in drive. 2021 Nissan Kicks SV FWD 4D UTV -4.16L Gasoline engine. 28300 miles
Are you saying the Nissan dealer will not fix it under the powertrain warranty?
BTW, you might want to edit your post, in the heading you state it is a Leaf, which is an EV model, then in the body of your post you state it is a Kicks, which has a gas engine.
Powertrain warranty generally doesn’t cover drivability problems, powertrain warranties cover internal engine components.
That will be up to the moderator; “Kicks” is not listed in the scroll-down as a Nissan model.