Sounds like you’re getting some good advice and some really bad advice.
If your Aunt is on the lease itself, then I would suggest a couple of things:
(1) Find out what the buyout is and get a number from Carvana, Vroom, and CarMax - you may be able to flip it (unlikely, but maybe) for less than the cost of the remaining payments. That would at least get you out of having to pay registration/insurance.
(2) Find out from Chrysler Cap what their policies are around registration and insurance. Many lease contracts have provisions that require active vehicle registration and insurance. You don’t want to run amok of these policies if you can avoid it.
Unless your Aunt doesn’t care about credit anymore, I wouldn’t go with the drop it off and forget about it approach.