Definitely worth talking to multiple garages. I’ve just done a mid contract change, school run is 72 miles daily (car is from my sons DLA) our Peugeot e208 was struggling with its range, so I asked to change to a car with ~300 miles.
First Hyundai dealership ‘had a look’ on the computer and said it would be a new build for an Ioniq 5, November or December delivery. Went to another Hyundai garage a few days later, they found three in stock, I’ve just picked it up today, it’s taken less than four weeks to get the car and that includes their Mota guy having a weeks holiday!