Coming from model y, thinking of completing my purchase tomorrow. Advice?

New member first post. So I found a 2023 ID4 pro S RWD at a local Volkswagen dealership. It has about 16k miles. It was a vehicle loaner at the dealership. While it is used, obviously, because it wasn't registered to an actual person outside of the dealership it's still considered a "new" car. For that reason I would only get the factory warranty and could not get CPO which I really wanted to get on top of it.

28k asking price, not certified pre-owned and still has a couple years left and most of the mileage left obviously for the original factory warranty.

I want certified pre-owned and they told me some story about how it cost them money to certify it and it's like $2,000 more. I used grock to help me understand why I feel like I'm smelling BS. Would it be unreasonable of me to expect them to certify it? Especially considering how low mileage it has, the condition it's in and the fact that it still has a factory warranty left?

Any advice to get this transaction done smoothly is appreciated. There's a 2021 with 50k miles which says pending certification. I don't want that car because this other one is practically brand new but I do want the extended warranty which they quoted me to be an added 3 years to the original manufacturer's warranty and 36k miles added as well. So 7 years, 86k miles.