If the elevator is for purposes of a showroom, demonstrating what it would look like when installed, and it is not intended to function as an accessible route in the building, then in my opinion, no it is not a code issue.
Here's some other examples, by way of analogy:
- An automobile showroom is classified as a retail occupancy, not as a parking garage.
- A video production studio's stage set for a cooking show is not classified as a commercial kitchen.
I had a client a few years ago that manufactures and sells high-end surgical equipment. They brought in surgeons and hospital administrators from all over the country to their corporate headquarters, where they had a complete replica of a functioning surgical suite constructed in their office building. They used it as a sales and training tool. All equipment is fully functional, but they do not actually do surgery in this space. So, it is not an "I" occupancy, and it is not licensed by the state as a medical facility. It is a "B" occupancy office.